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: Employee Free Choice Act
 Argument: EFCA strengthens workers' ability and right to unionize.

A: in favor
****
Q: Topic: Prostitution
 Argument: By worsening HIV/AIDS, prostitution will devastate societies.

A: against
****
Q: Topic: Comprehensive Nuclear-Test-Ban Treaty
 Argument: Nuclear test ban reduces risks of nuclear fallout.

A:
in favor
****