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: 2010 US bank tax
 Argument: Bank tax compensates for damage done by banks.
in favor

Topic: Nuclear energy
 Argument: Nuclear waste radiation no worse than natural radiation.
in favor

Topic: High-speed rail
 Argument: High-speed trains: costly govt project in search of need.

against