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: Hydrogen vehicles
 Argument: Hydrogen cars will help end foreign oil dependencies.

Answer: in favor


Question: Topic: European Union Expansion
 Argument: Cheaper labour is good for the economies of richer European nations.

Answer: in favor


Question: Topic: Three Gorges Dam
 Argument: The TGD helps to alleviate drought.

Answer:
in favor