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: Republika Srpska secession from Bosnia and Herzegovina
 Argument: Bosnian Serbs fought legitimately in Bosnian civil war.
in favor

Topic: High-speed rail
 Argument: High-speed rail decreases travel-time between cities.
in favor

Topic: Legalization of Marijuana
 Argument: Some train and plane tragedies were connected with marijuana use.

against