1. A computer-implemented method comprising: disambiguating, by a disambiguation computer, a document feature from an electronic document by way of: extracting, by a feature extraction computer, the document feature from the electronic document, and linking, by a linking computer, the extracted document feature to one or more document features stored in a knowledge database of co-occurring document features of a plurality of electronic documents; assigning, by a scoring computer, to the disambiguated document feature a confidence score indicative of a level of confidence associated with a degree of disambiguation of the document feature; and adding, by an in-memory database computer, the disambiguated document feature to the knowledge database of co-occurring document features when the disambiguated document feature matches a document feature of interest in an alert database based at least in part on the confidence score.