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The Cultural Heritage in CLEF 2012 (CHiC) pilot evaluation included these tasks: ad-hoc retrieval, semantic enrichment and variability tasks. At CHiC 2012, the University of Sheffield and the University of the Basque Country submitted a joint entry, attempting the three English monolingual tasks. For the ad-hoc task, the baseline approach used the Indri Search engine. Query expansion approaches used random walks using Personalised Page Rank over graphs constructed from Wikipedia and WordNet,dblp:conf/clef/AgirreCFHOS12 fatcat:fd67qwbr6nhgnhfxjjy5shjmx4