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: Solar shading can effectively and rapidly reverse global warming.
[EX A]: in favor

[EX Q]: Topic: Gene patents
 Argument: Little evidence exists that gene patents hurt research.
[EX A]: in favor

[EX Q]: Topic: Cluster bomb ban
 Argument: Importance of cluster bombs against threats makes a ban infeasible.
[EX A]:
against