A first file and a second file are retrieved from a database, in which the first and second files include an unstructured text stream. Metadata of the first and second files are extracted. The extracted metadata include a description category, entity source, geographic region, and a set of sub-files linked to the file. A data structure indicative of relationship between the first and second files is generated. Weighting factor is applied to the generated data structure. which indicates a degree of relationship between the first file and the second file. The relationship and the degree of the relationship are determined based on the extracted metadata of the first and second files. In response to a user requesting the first file, it is determined whether the second file should be provided in conjunction with the first file based on the weighting factor as applied to the data structure.