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: Year-round school
 Argument: Changing to year-round schooling has significant costs.
[EX A]: against

[EX Q]: Topic: Solar energy
 Argument: Solar energy does not damage air quality.
[EX A]: in favor

[EX Q]: Topic: Enhanced interrogation techniques
 Argument: US prosecuted foreign governments for waterboarding.
[EX A]:
against