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: Bombing Hiroshima and Nagasaki
 Argument: Hiroshima was a strategic military headquarters and target.

Answer: in favor


Question: Topic: Carbon emissions trading
 Argument: Emissions trading encourages investments in best technologies.

Answer: in favor


Question: Topic: Hybrid vehicles
 Argument: Hybrids are more economical than electric cars.

Answer:
in favor