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.
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Question: Sentence 1: A girl wearing a blue shirt, black tights and faded black boots with red painted fingernails is sitting on step outside of shop window while eating a sandwich. Sentence 2: A girl is eating a BLT sandwich.

Answer: A girl is eating.


Question: Sentence 1: Dog training on the mountain Sentence 2: A dog is taking a class.

Answer: A dog is on a mountain.


Question: Sentence 1: A man with a big backpack is walking through a grass trail up a hill. Sentence 2: A sad man with a big backpack is walking through a grass trail up a hill.

Answer:
A sad man with a big backpack is walking through a grass trail up a hill.