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: Hydroelectric dams
 Argument: Dams eliminate forests that absorb CO2 from the atmosphere.

A: against
****
Q: Topic: Geoengineering
 Argument: Geoengineering risks can be tested, corrected, avoided.

A: in favor
****
Q: Topic: High-speed rail
 Argument: Unlike automobiles, rail fosters a sense of community.

A:
in favor
****