TASK DEFINITION: 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". 
PROBLEM: Topic: Open primaries
 Argument: Open primaries favor voter wishes over party establishment's.

SOLUTION: in favor

PROBLEM: Topic: Palestinian right of return
 Argument: Jewish state intended to preempt any right of return.

SOLUTION: neutral

PROBLEM: Topic: Hydrogen vehicles
 Argument: Hydrogen is non-toxic, unlike most fossil fuels.

SOLUTION:
in favor