9. A non-transitory computer readable storage medium storing instructions, the instructions comprising: one or more instructions that, when executed by one or more computing devices, cause the one or more computing devices to: generate first scores indicating respective likelihood values that data stored in a first entry in a first database and data stored in second entries in a second database occur in a common document, the second database being separate from the first database, each of the first entry and the second entries including respective fields, and a particular field, of the respective fields, including information regarding a particular attribute of an object being represented by the first entry; identify, based on the first scores, two or more of the second entries in the second database; generate second scores for the two or more of the second entries, the two or more of the second entries including a particular second entry, the second scores including a second score for the particular second entry, the respective fields including first fields in the first entry and second fields in the particular second entry, the first fields including the particular field, and the second score for the particular second entry being generated based on comparing data stored in the first fields in the first entry and data stored in the second fields of the particular second entry; determine that the second score satisfies a threshold; identify the particular second entry, of the two or more of the second entries, based on determining that the second score satisfies the threshold; and store information associating the first entry and the particular second entry.
9. A non-transitory computer readable storage medium storing instructions, the instructions comprising: one or more instructions that, when executed by one or more computing devices, cause the one or more computing devices to: generate first scores indicating respective likelihood values that data stored in a first entry in a first database and data stored in second entries in a second database occur in a common document, the second database being separate from the first database, each of the first entry and the second entries including respective fields, and a particular field, of the respective fields, including information regarding a particular attribute of an object being represented by the first entry; identify, based on the first scores, two or more of the second entries in the second database; generate second scores for the two or more of the second entries, the two or more of the second entries including a particular second entry, the second scores including a second score for the particular second entry, the respective fields including first fields in the first entry and second fields in the particular second entry, the first fields including the particular field, and the second score for the particular second entry being generated based on comparing data stored in the first fields in the first entry and data stored in the second fields of the particular second entry; determine that the second score satisfies a threshold; identify the particular second entry, of the two or more of the second entries, based on determining that the second score satisfies the threshold; and store information associating the first entry and the particular second entry. 10. The non-transitory computer readable storage medium of claim 9 , where the one or more instructions to generate the first scores further include: one or more instructions to: identify first locations, in a plurality of documents, associated with occurrences of the data stored in the first entry; identify second locations, in the plurality of documents, associated with occurrences of the data stored in the second entries; and generate the first scores based on comparing the first locations and the second locations.