Abstract: A computer system creates a plurality of objects using facts derived from electronic documents, each object including one or more facts describing an entity associated with the object. The system generates a value for an object of an unknown entity type, of the plurality of objects, by using an entity type model for a known entity type. The entity type model is based on a set of features of a plurality of objects of the known entity type, and the value indicates whether the object of an unknown entity type is of the known entity type. The system assigns the known entity type to the object of an unknown entity type in response to a determination that the value indicates the object of an unknown entity type is of the known entity type, and stores the object with the assigned entity type.