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: Manned mission to Mars
 Argument: Cumulative challenges and risks of Mars mission are too great.
against

Topic: Colonization of the Moon
 Argument: Moonbase would be ideal staging area for space exploration.

in favor