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: Waterboarding
 Argument: Waterboarding is highly valuable in the war on terror.

A: in favor
****
Q: Topic: Legalization of adult incest
 Argument: Banning adult incest is analogous to banning homosexuality.

A: in favor
****
Q: Topic: Free trade
 Argument: Free trade and markets harm the environment.

A:
against
****