11. The non-transitory computer readable storage medium of claim 9 , where the first database includes first entries, and where the one or more instructions to generate the first scores include: one or more instructions to: generate first annotation information describing a first subset, of the first entries in the first database having data that occurs in the common document; generate second annotation information describing a second subset, of the second entries in the second database, having data that occurs in the common document; and generate the first scores based on comparing the first annotation information and the second annotation information.
11. The non-transitory computer readable storage medium of claim 9 , where the first database includes first entries, and where the one or more instructions to generate the first scores include: one or more instructions to: generate first annotation information describing a first subset, of the first entries in the first database having data that occurs in the common document; generate second annotation information describing a second subset, of the second entries in the second database, having data that occurs in the common document; and generate the first scores based on comparing the first annotation information and the second annotation information. 12. The non-transitory computer readable storage medium of claim 11 , where: the common document is included in a plurality of documents, the first annotation information includes data identifying locations, in the plurality of documents, associated with the data stored in the first entries, the second annotation information includes data identifying locations, in the plurality of documents, associated with the data stored in the second entries, and the one or more instructions to generate the first scores further include: one or more instructions to: generate co-occurrence information using the first annotation information and the second annotation information; and use the co-occurrence information to generate the first scores.