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.

Sentence 1: A cowboy on a horse trying to lasso a bull at a rodeo. Sentence 2: A cowboy lassoing a bucking bull.
A cowboy at the rodeo.

Sentence 1: a man with green marker written on his arm Sentence 2: a man with amnesia makes a note
A person with an arm

Sentence 1: Dirt bikers riding off a jump. Sentence 2: A group of people in a dirt bike competition

People riding on dirt bikes