public String[] getStartWords(){
		String[] sw = new String[sentences.size()];
		Iterator<String[]> it = sentences.iterator();
		int index = 0;
		while(it.hasNext()){//For each sentence
			String[] sentence = it.next();
			if(sentence.length > 0){
				sw[index++] = sentence[0];
			}
		}
		return sw;
	}