You will be given a topic and an argument. Decide the argument's stance towards that topic. The argument's stance is in favor or against the topic. If the argument supports that topic, answer with "in favor"; otherwise, if the argument opposes the topic, answer with "against".

topic: Manned mission to Mars
argument: Martian dust is a major risk to a manned mission
against

topic: Medical marijuana dispensaries
argument: That marijuana is herbal does not mean it is safe
against

topic: Prostitution
argument: State resources should not be wasted fighting prostitution
in favor