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 Q]: Topic: College football playoffs
 Argument: College football can evolve to include a playoff.
[EX A]: in favor

[EX Q]: Topic: NATO expansion
 Argument: NATO expansion can only lead to the overstretching of the organisation and thus the undermining of stability for the entirety of Europe.
[EX A]: against

[EX Q]: Topic: Hybrid vehicles
 Argument: Hybrid cars are simply a way for oil companies to maintain profits.
[EX A]:
against