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 young man with no shirt on is wearing black pants and sneakers is jumping over a blue skateboard. Sentence 2: This young man is attempting the most difficult skateboarding trick known to man.

Answer: a man in black pants jumps over his skateboard


Question: Sentence 1: Three bicyclists riding down a steep course wearing helmets. Sentence 2: the bicyclists are being careful down the steep course.

Answer: The bicyclists are  wearing helmets.


Question: Sentence 1: A man in yellow and a man in green boating down a river on an overcast day. Sentence 2: A man in yellow and a man in green boating down a muddy river on an overcast day.

Answer:
There are two men in a boat.