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: The cowboy kneels down to put the brown strap on his boot. Sentence 2:  The cowboy kneels down to put the brown strap on his metal boot.
 The cowboy kneels down.

Sentence 1: A professor is holding up a piece of paper. Sentence 2: The professor has a paper.
The teacher is holding a piece of paper above his head.

Sentence 1: A man wearing a brown t-shirt is talking to a woman wearing a flowered tank top at an outdoor music concert. Sentence 2: A man is talking to his wife.

A man is talking to a woman