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: Geoengineering, solar shading
 Argument: Sunshield costs are reasonable in face of global warming.
[EX A]: in favor

[EX Q]: Topic: Three Gorges Dam
 Argument: Three Gorges Dam damages water quality.
[EX A]: against

[EX Q]: Topic: Electric vehicles
 Argument: Electric vehicles need not be able to quickly recharge.
[EX A]:
neutral