title: how to find unstructured date and time from a sentence in python?
body: <p>when I use this code for extracting the date</p>
  
  <p>dateutil.parser.parse('today is 21 jan 2016')</p>
  
  <p>It throws an error -> ValueError: unknown string format</p>
  
  <p>is there any way to extract dates and time from a sentence???</p>