Navigating through key assertions from various data sources with the aTag Explorer web interface. Here, a user did a text search for the drug ‘varenicline’, then restricted results to those statements that deal with ‘Tobacco Use Cessation’ by selecting a facet value. The tags / facet values for each statement are terms from terminologies / ontologies such as MeSH and DBpedia. The ‘Broader tags’ for each statement are inferred by the system from these terminologies / ontologies. This makes it possible to identify links between statements that are not explicitly contained in the source literature and datasets.