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: Israeli military assault in Gaza
Argument: Israel's right to self-defense does not justify mass murder.
against

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

Topic: European missile defense
Argument: A European missile defense system threatens and antagonizes Russia.
against