instruction:
In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly contradict each other. Generated sentences must be short, with less than 15 words. New information can be introduced. Avoid using pronouns to confuse the subject of the sentence.
question:
Sentence 1: A male wearing yellow pants catches air as he snowboards down an empty mountain. Sentence 2: A snowboarder shows off a trick as he is filmed for a television commercial.
answer:
The man is snowboarding.


question:
Sentence 1: Man in a one shirt popping wheelies in the air on a red bicycle in a path lined by grass. Sentence 2: A man is riding a bike in a trick competition.
answer:
A man is riding a bike.


question:
Sentence 1: woman riding a bicycle cart. Sentence 2: A woman is trying out a new type of bicycle.
answer:

A woman is riding.