Given the Target and Argument texts detect the stance that the argument has towards the topic. There are three types of stances "in favor", "against", and "neutral". 

Ex Input:
Topic: Free public transportation
 Argument: Car sales would drop significantly.

Ex Output:
against


Ex Input:
Topic: War on Drugs
 Argument: Costs of Drug War are greater than costs of legalization.

Ex Output:
against


Ex Input:
Topic: Carbon emissions trading
 Argument: Carbon trading wrongly turns atmosphere into tradeable property.

Ex Output:

against