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". 

[Q]: Topic: Carbon emissions trading
 Argument: US cap-and-trade in sulfur dioxidew was succesful.
[A]: in favor


[Q]: Topic: Animal testing
 Argument: Allegations of animal abuse are reviewed by pier board.
[A]: neutral


[Q]: Topic: Oil sands
 Argument: Oil sands threaten down-river communities.
[A]:
against