code: private Long tokenMatch(SNode tok) {
  		// check if the span is a matched node
  		SFeature featMatched = tok.getFeature(ANNIS_NS, FEAT_MATCHEDNODE);
  		Long matchRaw = featMatched == null ? null : featMatched.getValue_SNUMERIC();
  		return matchRaw;
  	}
docs: Checks if a token is a marked match
  
  @param tok the checked token.
  @return Returns null, if token is not marked.