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: Bombing Hiroshima and Nagasaki
 Argument: Hiroshima was a strategic military headquarters and target.
in favor

Topic: Gene patents
 Argument: Genes cannot be owned practically, are part of commons.
against

Topic: Right to bear arms in the US
 Argument: A well-regulated militia can apply to a state-run as well as an independent militia.

in favor