A set of randomly selected PubMed articles with PubTator annotation. The labels of PubTator annotations are converted to corresponding labels for LitCoin as follows: 'Gene' -> 'GeneOrGeneProduct', 'Disease' -> 'DiseaseOrPhenotypicFeature', 'Chemical' -> 'ChemicalEntity' 'Species' -> 'OrganismTaxon' 'Mutation' -> 'SequenceVariant' 'CellLine' -> 'CellLine'