public List<Frame> getFramesForTargetLemma(String targetLemma){   //depricated
		List<Frame> result = new ArrayList<Frame>();
		for(Frame frame: frames){
			if(frame.getTargetLemmaIDref().equals(targetLemma))
				result.add(frame);
		}
		if(result.size()>0) return result;
		return null;
	}