code: public boolean checkPosConstraint(Sentence s, String posConstraint, MatchResult m, JCas jcas) {
  		Pattern paConstraint = Pattern.compile("group\\(([0-9]+)\\):(.*?):");
  		for (MatchResult mr : Toolbox.findMatches(paConstraint,posConstraint)) {
  			int groupNumber = Integer.parseInt(mr.group(1));
  			int tokenBegin = s.getBegin() + m.start(groupNumber);
  			int tokenEnd   = s.getBegin() + m.end(groupNumber);
  			String pos = mr.group(2);
  			String pos_as_is = getPosFromMatchResult(tokenBegin, tokenEnd ,s, jcas);
  			if (pos_as_is.matches(pos)) {
  				Logger.printDetail("POS CONSTRAINT IS VALID: pos should be "+pos+" and is "+pos_as_is);
  			} else {
  				return false;
  			}
  		}
  		return true;
  	}
docs: Check whether the part of speech constraint defined in a rule is satisfied.
  @param s
  @param posConstraint
  @param m
  @param jcas
  @return