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". 

Topic: Three Gorges Dam
 Argument: Floating garbage is piling up behind the TGD.
against

Topic: Cellulosic ethanol
 Argument: Cellulosic ethanol can generate good-paying jobs.
in favor

Topic: High-speed rail
 Argument: High speed rail not best way to create local jobs.

against