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". 

[Q]: Topic: Cellulosic ethanol
 Argument: Cellulosic ethanol can be 0 emissions.
[A]: in favor


[Q]: Topic: More troops to Afghanistan under Obama
 Argument: Afg is backward, cannot be salvaged by US.
[A]: against


[Q]: Topic: US offshore oil drilling
 Argument: Offshore drilling has a very strong environmental record.
[A]:
in favor