Fig. 1From: A protocol for adding knowledge to Wikidata: aligning resources on human coronavirusesStructure of a Wikidata item, containing a set of statements which are key-value pairs, with qualifiers and references. Here the item for the angiotensin-converting enzyme 2 (ACE2) protein is given containing a statement about its molecular function. This molecular function (peptidyl-dipeptidase activity) contains a reference stating when and where this information was obtainedBack to article page