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: Assault weapons ban in the United States
 Argument: The Supreme Court has affirmed the individual right to bear arms.
against

Topic: Ending US sanctions on Cuba
 Argument: Sanctioning Cuba is appropriate punishment for its flouting the UN.
against

Topic: New START Treaty
 Argument: US should not sign New START to bribe Russia on Iran.

against