The goal of this task is to push the research frontier towards hybrid information systems. We aim to promote systems and approaches that are able to deal with the whole diversity of the Web, especially for, but not restricted to, the context of bio-medicine. This goal is pursued by the organization of challenges. The second challenge consisted of two tasks: semantic indexing and question answering. 61 systems participated by 18 different participating teams for the semantic indexing task, of

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... ch between 25 and 45 participated in each batch. The semantic indexing task was tackled by 22 systems, which were developed by 8 different organizations. Between 15 and 19 of these systems addressed each batch. The question answering task was tackled by 18 different systems, developed by 7 different organizations. Between 9 and 15 of these systems submitted results in each batch. Overall, the best systems were able to outperform the strong baselines provided by the organizers.