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: Drivers licenses for Illegal immigrants in the US
 Argument: Offering illegal immigrants driver's licenses would violate the rule of law.
against

Topic: Lowering US drinking age from 21 to 18
 Argument: Many states allow under-age drinking with parents/spouses.
in favor

Topic: Assassination of a Dictator
 Argument: Assassinations erode norms against assassination; jeopardizes leaders.

against