title: Named entity recognition promlem to identify the text "next monday" as date?
body: <p>I'm new to text mining and NLP. I'm trying to use named entity recognition (NER) (Stanford Named Entity Tagger) to extract dates from the given text. I'm using the online demo provided in Stanford NLP <a href="http://nlp.stanford.edu:8080/ner/process" rel="nofollow">http://nlp.stanford.edu:8080/ner/process</a> and GATE ANNIE <a href="http://services.gate.ac.uk/annie/" rel="nofollow">http://services.gate.ac.uk/annie/</a></p>
  
  <p>This demo is not able to recognize the texts like complete "last Sunday", "next Monday", "this month end" "till this Sunday evening" as date. Sunday or Monday alone will not be useful to determine the date.  Is there any option to extract the actual text mentioned by the given example texts? </p>
  
  <p>Example text:</p>
  
  <p>Treat yourself with Puma as it offers Flat 50% off. Hurry offer valid till this Sunday. Happy Shopping.</p>
  
  <p>Extracted date: 25-08-2013 (Considering today is 19-08-2013. Date format can be anything)</p>
  
  <p>Any library provides this kind of date recognition feature or is it possible to build custom model to recognize date as given in the example text? </p>