code: public String getContextStr(Sentence sent, int wordIdx){
  		String cpStr = "";
  		
  		for (int i = 0; i < cntxGenVector.size(); ++i){
  			String [] context = cntxGenVector.get(i).getContext(sent, wordIdx);
  			if (context != null){
  				for (int j = 0; j < context.length; ++j){
  					if (context[j].trim().equals("")) continue;
  					cpStr += context[j] + " ";
  				}
  			}
  		}
  		
  		return cpStr.trim();
  	}
docs: Gets the context str.
  
  @param sent the sentence
  @param wordIdx the word index
  @return the string representing contexts extracted at wordIdx of the sentence sent