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".

[EX Q]: Topic: Bombing Hiroshima and Nagasaki
Argument: No international law forbade the bombing of Japanese civilians.
[EX A]: in favor

[EX Q]: Topic: Medical marijuana dispensaries
Argument: Marijuana smoke is highly damaging to the lungs.
[EX A]: against

[EX Q]: Topic: Algae biofuel
Argument: Algae fuel ponds must be expensively covered.
[EX A]:
against