instruction:
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".
question:
Topic: Manned mission to Mars
Argument: Cumulative challenges and risks of Mars mission are too great.
answer:
against

question:
Topic: US debt ceiling deal
Argument: Debt deal doesn't cut spending enough to solve deficit.
answer:
against

question:
Topic: NATO expansion
Argument: Expansion will make more resources available to NATO.
answer:
in favor