1. A method comprising: generating, by one or more devices, 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; identifying, by the one or more devices and based on the first scores, two or more of the second entries in the second database; generating, by the one or more devices, 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; determining, by the one or more devices, that the second score satisfies a threshold; identifying, by the one or more devices, the particular second entry, of the two or more of the second entries, based on determining that the second score satisfies the threshold; and storing, by the one or more devices, information associating the first entry and the particular second entry.