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: Gay marriage
 Argument: Gay marriage undercuts procreation at time of vulnerability.
[EX A]: against

[EX Q]: Topic: Natural gas vehicles
 Argument: Odorless natural gas can escape detection risking fire/explosion.
[EX A]: against

[EX Q]: Topic: No-fly zone over Libya
 Argument: No fly zone in Libya prevents a massacre.
[EX A]:
in favor