1. A computer implemented method comprising the following operations performed by one or more processors: identifying, by one or more of the processors, an entity reference in a knowledge graph, wherein the entity reference corresponds to an entity type; identifying, by one or more of the processors, a missing data element associated with the entity reference, the missing data element reflecting a property of the entity reference for which no property value is currently assigned; generating, automatically by one or more of the processors in response to identifying the missing data element associated with the entity reference, a query based at least in part on the missing data element and the entity type; providing, by one or more of the processors, the query to a query processing engine; receiving information from the query processing engine in response to the query; and updating, by one or more of the processors in response to receiving information from the query processing engine, the knowledge graph based at least in part on the received information.