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". 
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Question: Topic: Three Gorges Dam
 Argument: Floating garbage is piling up behind the TGD.

Answer: against


Question: Topic: Colonization of the Moon
 Argument: A manned presence on the Moon is superior to a robotic one.

Answer: in favor


Question: Topic: Mandatory labeling of genetically modified foods
 Argument: Labeling is wrong when GM foods show no differences with other foods.

Answer:
against