public static boolean negate(String s){
		s = s.toLowerCase();
		String[] words = s.split("\\s+");
		int count = 0;
		for (int i=0; i<words.length; i++){
			String currentWord = words[i].replaceAll("([a-z]+)[?:!.,;]*", "$1");
			if (negations.contains(currentWord)){
				count++;
			}
		}
		if (count % 2 == 0){
			return false;
		} else {
			return true;
		}
	}