1. A method of extracting phrases from a corpus of documents, the method comprising: generating, by a processor, a set of candidate phrases from the documents in the corpus, wherein each candidate phrase corresponds to a group of two or more words that occur consecutively in at least one of the documents in the corpus, each candidate phrase having an occurrence count associated therewith; computing, by the processor, a statistical metric for each candidate phrase based at least in part on the occurrence count, wherein the statistical metric indicates a likelihood of the words within the candidate phrase occurring consecutively by chance; and selecting, by the processor, a plurality of the candidate phrases as meaningful phrases, the selection being based on the statistical metric.