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: War on Drugs
 Argument: Costs of Drug War are greater than costs of legalization.
[EX A]: against

[EX Q]: Topic: Charter schools
 Argument: Adaptive charter schools can make necessary changes.
[EX A]: in favor

[EX Q]: Topic: Natural gas vehicles
 Argument: Natural gas utilities have a long record of safety.
[EX A]:
in favor