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: Free public transportation
 Argument: Car sales would drop significantly.
[EX A]: against

[EX Q]: Topic: Banning cell phones in cars
 Argument: Markets are better at regulating cell phone use in cars.
[EX A]: against

[EX Q]: Topic: Solar energy
 Argument: Solar panels contain cadmium, which is environmentally hazardous.
[EX A]:
against