title: Use tag as attibute in crfsuite
body: <p>I'm very new in CRF and I want to use CRFsuite to tag words. I read <a href="http://www.chokkan.org/software/crfsuite/manual.html" rel="nofollow noreferrer">CRFsuite's manual</a> and understand the format of the training data, but if I want to add some features which have some tags of "near words", what's the training data file look like?</p>
  
  <p>I have google around but I found nothing about this problem.</p>