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Statistical source expansion for question answering

Nico Schlaefer, Jennifer Chu-Carroll, Eric Nyberg, James Fan, Wlodek Zadrozny, David Ferrucci
2011 Proceedings of the 20th ACM international conference on Information and knowledge management - CIKM '11  
A source expansion algorithm automatically extends a given text corpus with related information from large, unstructured sources.  ...  While the expanded corpus is not intended for human consumption, it can be leveraged in question answering (QA) and other information retrieval or extraction tasks to find more relevant knowledge and to  ...  Question Answering Tasks We evaluated our statistical source expansion approach on two question answering tasks: (1) factoid questions from annual QA evaluations conducted by the Text REtrieval Conference  ... 
doi:10.1145/2063576.2063632 dblp:conf/cikm/SchlaeferCNFZF11 fatcat:whoy62klazctbdo4p57wbevkdu

National Survey of United States Human Immunodeficiency Virus Medical Providers' Knowledge and Attitudes About the Affordable Care Act

Kathleen A McManus, Kelsey McManus, Rebecca Dillingham
2018 Clinical Infectious Diseases  
Descriptive statistics, Mann-Whitney U tests, and binary logistic regression were performed. Results. Of the 253 survey participants, the majority (61%) answered all 4 knowledge questions correctly.  ...  Medicaid expansion compared with 3.37 (SD, 1.00) for Medicaid nonexpansion (P = .002).  ...  The content is solely the responsibility of the authors and does not necessarily represent the official views of the Agency for Healthcare Research and Quality (AHRQ). Financial support.  ... 
doi:10.1093/cid/ciy296 pmid:30165397 fatcat:ezkjtnksibak7a7ebjdtigdjka

Statistical Machine Translation for Query Expansion in Answer Retrieval

Stefan Riezler, Alexander Vasserman, Ioannis Tsochantaridis, Vibhu O. Mittal, Yi Liu
2007 Annual Meeting of the Association for Computational Linguistics  
We present an approach to query expansion in answer retrieval that uses Statistical Machine Translation (SMT) techniques to bridge the lexical gap between questions and answers.  ...  SMT model trained on question-answer pairs.  ...  The SMT-based approaches presented in this paper can be seen as global query expansion techniques in that our question-answer translation model uses the whole question-answer corpus as information source  ... 
dblp:conf/acl/RiezlerVTML07 fatcat:ixaktrrskfcqraia3fxl55aghi

Using the weighted keyword model to improve information retrieval for answering biomedical questions

Hong Yu, Yong-Gang Cao
2009 Summit on translational bioinformatics  
Information retrieval systems that can provide immediate and relevant answers to these questions can be invaluable aids to the practice of evidence-based medicine.  ...  Physicians ask many complex questions during the patient encounter.  ...  The authors also acknowledge the National Library of Medline for making the 4,654 clinical questions and their annotations freely available.  ... 
pmid:21347188 pmcid:PMC3041568 fatcat:5ehyqpvvozh2pcn63cdtjcnjru

Textual resource acquisition and engineering

J. Chu-Carroll, J. Fan, N. Schlaefer, W. Zadrozny
2012 IBM Journal of Research and Development  
A key requirement for high-performing question-answering (QA) systems is access to high-quality reference corpora from which answers to questions can be hypothesized and evaluated.  ...  In this paper, we discuss the methodology that we developed for IBM Watson for performing acquisition, transformation, and expansion of textual resources.  ...  BStatistical source expansion for question answering,[ in Proceedings of the 20th ACM International Conference on Information and Knowledge Management, ACM, New York, NY, 2011.)  ... 
doi:10.1147/jrd.2012.2185901 fatcat:rk7qmv7umjh3znxojvmf72smgu

Experiments with Query Expansion in the RAPOSA (FOX) Question Answering System

Luís Sarmento, Jorge Teixeira, Eugénio C. Oliveira
2008 Conference and Labs of the Evaluation Forum  
In this paper we present the results of applying a statistical query expansion method on the retrieval stage of a QA system for Portuguese (RAPOSA).  ...  Our approach involves expanding queries for event-related or action-related factoid questions using a verb thesaurus automatically generated using information extracted from large corpora.  ...  estar, viver, andar, 2 trabalhar, entrar Table 5 : 5 Statistics for the 41 factoid questions in which our query expansion method could be applied, when applying verb removal instead of query expansion  ... 
dblp:conf/clef/SarmentoTO08a fatcat:uwj3dkh7g5cend3zfsnab4mx5u

Retrieval-based Question Answering for Machine Reading Evaluation

Suzan Verberne
2011 Conference and Labs of the Evaluation Forum  
In the near future, we will follow up on the current work with more experiments related to expansion of questions and documents for the purpose of question answering.  ...  The Question Answering for Machine Reading (QA4MRE) task was set up as a reading comprehension test consisting of 120 multiple-choice questions pertaining to twelve target texts (the test documents) grouped  ...  Question-to-facts expansion In the previous subsection we described a statistical method for expanding the test document with information from the background corpus.  ... 
dblp:conf/clef/Verberne11 fatcat:bt632vrlvbgvbi3uxwmvlqfyau

Document Expansion for Cross-Lingual Passage Retrieval

Eneko Agirre, Olatz Ansa, Xabier Arregi, Maddalen Lopez de Lacalle, Arantxa Otegi, Xabier Saralegi
2010 Conference and Labs of the Evaluation Forum  
Our focus was threefold: (1) to check to what extent information retrieval (IR) can achieve good results in passage retrieval without question analysis and answer validation, (2) to check dictionary techniques  ...  for Basque to English retrieval when faced with the lack of parallel corpora for Basque in this domain, and (3) to check the contribution of semantic relatedness based on WordNet to expand the passages  ...  Table 3 lists, for each language pair, the number of questions answered correctly in run 1 alone (i.e. using expansions), in run 2 alone (i.e. not using expansions) and in both runs, respectively.  ... 
dblp:conf/clef/AgirreAALOS10 fatcat:cqfzuyswrzak5nrvx7ryjtuquy

Assessing the Impact of Thesaurus-Based Expansion Techniques in QA-Centric IR [chapter]

Luís Sarmento, Jorge Teixeira, Eugénio Oliveira
2009 Lecture Notes in Computer Science  
In this paper, we assess the impact of using thesaurus-based query expansion methods, at the Information Retrieval (IR) stage of a Question Answering (QA) system.  ...  We focus on expanding queries for questions regarding actions and events, where verbs have particularly important roles.  ...  For factoid questions that explicitly refer to actions or events, expansion is made by first taking the source verb and finding its lemma, v s , and then using the verb thesaurus to find up to n verbs  ... 
doi:10.1007/978-3-642-04447-2_37 fatcat:ndbiua622jhkdm2w75hlnmcpmu

Revamping Question Answering with a Semantic Approach over World Knowledge

Nuno Cardoso, Iustin Dornescu, Sven Hartrumpf, Johannes Leveling
2010 Conference and Labs of the Evaluation Forum  
Classic textual question answering (QA) approaches that rely on statistical keyword relevance scoring without exploiting semantic content are useful to a certain extent, but are limited to questions answered  ...  In this paper, we present our motivations for preferring semantic approaches to QA over textual approaches, with Wikipedia serving as a raw knowledge source.  ...  Acknowledgments This work is partially supported by FCT for its LASIGE Multi-annual support, GREASE-II project (grant PTDC/EIA/73614/2006) and Nuno Cardoso's scholarship (grant SFRH/BD/45480/2008), partly  ... 
dblp:conf/clef/CardosoDHL10 fatcat:de54aiqsmndzhcpyjdrpjlxnqe

Extending Knowledge and Deepening Linguistic Processing for the Question Answering System InSicht [chapter]

Sven Hartrumpf
2006 Lecture Notes in Computer Science  
The German question answering (QA) system InSicht participated in QA@CLEF for the second time. It relies on complete sentence parsing, inferences, and semantic representation matching.  ...  The lack of coreference resolution in InSicht was one major source of missing answers in QA@CLEF 2004.  ...  (This lack caused 6% of InSicht's wrong empty answers for questions from QA@CLEF 2004.)  ... 
doi:10.1007/11878773_41 fatcat:fmbgkmpwhvar3kzv7ej5lu2qwy

National Survey of United States HIV Clinicians: Knowledge and Attitudes about the Affordable Care Act and Opinions of Its Impact on Quality of Care and Barriers to Care

Kathleen A McManus, Joshua Ferey, Elizabeth Farrell, Rebecca Dillingham
2020 Open Forum Infectious Diseases  
Descriptive statistics, Mann-Whitney U tests, and binary logistic regression were performed. Results Of the 211 survey participants, the majority (70%) answered all 4 knowledge questions correctly.  ...  Participants from Medicaid expansion states were more likely to report an improved ability to provide high quality care compared to participants from Medicaid non-expansion states (50% vs. 34%, p=0.01)  ...  Acknowledgements The authors thank the HIV clinicians for their participation in the study. Potential Conflicts of  ... 
doi:10.1093/ofid/ofaa225 pmid:32665960 pmcid:PMC7336569 fatcat:2p5n4tilqnbzvo442toh4ane3a

Query Expansion Based on Crowd Knowledge for Code Search

Liming Nie, He Jiang, Zhilei Ren, Zeyi Sun, Xiaochen Li
2016 IEEE Transactions on Services Computing  
QECK identifies software-specific expansion words from the high quality pseudo relevance feedback question and answer pairs on Stack Overflow to automatically generate the expansion queries.  ...  We conduct three experiments to evaluate our QECK technique and investigate QECKRocchio in a large-scale corpus containing real-world code snippets and a question and answer pair collection.  ...  Stack Overflow [7] is a popular question answering site, which provides a platform for developers to help others by asking and answering questions [52] .  ... 
doi:10.1109/tsc.2016.2560165 fatcat:5cae7b5okvdxdixmjwncqrgdiy

Improving Question Answering System based on a Hybrid Technique

Ayatallah Gamal Abass, Sameh Abd El-Ghany, Ahmed Abo Elfetoh
2018 Journal of Computer Science  
The main goal of this new model is to enrich the question by reformulating it into similar meaning queries with additional information and hence for improving question answering process.  ...  Query expansion is an approach which is used to extend question key words with new related words that are not included in question.  ...  For building FAQ data source every crawled page is set in the form of question and its related answer (question-answer pairs).  ... 
doi:10.3844/jcssp.2018.1202.1212 fatcat:bhxfsv6fcfemrktbzuyk63vkja

Question answering passage retrieval using dependency relations

Hang Cui, Renxu Sun, Keya Li, Min-Yen Kan, Tat-Seng Chua
2005 Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '05  
State-of-the-art question answering (QA) systems employ termdensity ranking to retrieve answer passages.  ...  Previous studies attempted to address this problem by matching dependency relations between questions and answers.  ...  This shows that query expansion boosts recall using expansion terms, allowing the system to answer more questions correctly.  ... 
doi:10.1145/1076034.1076103 dblp:conf/sigir/CuiSLKC05 fatcat:6c2mgupdznc45lmftcyhp4bmn4
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