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: Cluster bomb ban
 Argument: Cluster bombs are usually used in uninhabited areas.
[EX A]: against

[EX Q]: Topic: 700 mile US Mexico border fence
 Argument: The 700 wall cannot be compared to the Berlin wall.
[EX A]: neutral

[EX Q]: Topic: NATO expansion
 Argument: Expansion will make more resources available to NATO.
[EX A]:
in favor