public BackwardChaining(String ask, String tell)
	{
		TellSplitter ts = new TellSplitter(tell);
		rules = ts.getRules();						//get rules
		facts = ts.getFacts();						//get facts
		queued = new ArrayList<String>();
		workingList = new ArrayList<String>();
		workingList.add(ask);						//add ask symbol to working list(agenda)
	}