1. A computer implemented method, comprising: identifying a plurality of classification terms indicative of a classification; identifying a corpus of communications from one or more databases, the corpus of communications including a plurality of communications that are not labeled with an association to the classification; determining a cluster of the communications based on occurrence of one or more of the classification terms in the communications of the cluster; determining a feature set based on the communications of the cluster, the feature set including one or more features that are based on content of the communications that is in addition to the classification terms; and assigning the feature set to an indication of the classification.