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: Ecotourism
 Argument: Ecotourism generates funds for conservation.
[EX A]: in favor

[EX Q]: Topic: Underground nuclear waste storage
 Argument: Underground storage will never overcome societal fears.
[EX A]: against

[EX Q]: Topic: Hydrogen vehicles
 Argument: Electric car battery technology and costs are improving rapidly.
[EX A]:
in favor