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: Lowering US drinking age from 21 to 18
 Argument: 21 drinking-age general lowers under-age drinking.

SOLUTION: against

PROBLEM: Topic: Geoengineering, iron fertilization of algae blooms
 Argument: Global warming kills algae, worsens warming; iron fertilization helps.

SOLUTION: in favor

PROBLEM: Topic: Ending US sanctions on Cuba
 Argument: Sanctions against Cuba violated laws on the freedom of navigation.

SOLUTION:
in favor