3. The method of claim 1 , further comprising generating the concept vectors for the homonym concepts by, for each homonym concept: determining a first word usage for an article in a reference corpus corresponding to the homonym concept; determining a second word usage for documents using the homonym concept in current social media documents; and combining the first and second word usages to generate the concept vector for the homonym concept.
4. The method of claim 3 , wherein the first and second word usage include first and second vectors, respectively, the first and second vectors having entries including words and a corresponding frequency metric; and wherein combining the first and second word usages comprises combining the first and second vectors.