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: Mine Ban Treaty (Ottawa Treaty)
 Argument: Deploying smart mines encourages the use of all mines.
in favor

Topic: Deporting illegal immigrants in the US
 Argument: Trail of Tears demonstrates injustice of mass deportation.
against

Topic: Greece bailout
 Argument: General statements against  Greece bailout.

neutral