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". 

Topic: Kangaroo culling in Australia
 Argument: Kangaroo destruction of habitats is causing soil erosion that damages crops.
in favor

Topic: Castration of sex offenders
 Argument: Innocent shouldn't face choice of more prison vs. castration.
against

Topic: Needle exchanges
 Argument: HIV transmission has increased despite needle exchanges.

against