Have a look at 'Named Entity Recognition' (NER), particularly a 7-class model to recognize: location, person, organization, money, percent, date and time. The

Have a look at 'Named Entity Recognition' (NER), particularly a 7-class model to recognize: location, person, organization, money, percent, date and time. The Stanford NLP Group has a NER project: http://www-nlp.stanford.edu/software/CRF-NER.shtml http://www-nlp.stanford.edu/software/CRF-NER.shtml, and there are many others.