20. The system of claim 16 , where the processor, when determining that the first word is a keyword for the particular category, is further to: determine a score for the first word, and determine that the first word is the keyword for the particular category further based on the score satisfying a score threshold.
20. The system of claim 16 , where the processor, when determining that the first word is a keyword for the particular category, is further to: determine a score for the first word, and determine that the first word is the keyword for the particular category further based on the score satisfying a score threshold. 21. The system of claim 20 , where the score for the first word is based on a third value associated with a third frequency that the first word appears in the collection of documents.