1. A method of classifying entities, the method comprising: recognizing occurrences of an entity in a plurality of documents; identifying a plurality of features in contexts of said occurrences, a first one of the features being derived from a first context of a first one of the occurrences in a first one of the documents, and a second one of the features being derived from a second context of a second one of the occurrences in a second one of the documents; calculating a sum of a plurality of weights, wherein each of the features is associated with one of the weights; making a first determination that said sum exceeds a first threshold; making a second determination that a label applies to said entity based on said first determination; and storing or communicating a fact that said label applies to said entity.