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 father and his son bonding. Sentence 2: A father and his son are playing catch.
answer:
A man has a son.


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


question:
Sentence 1: Good Samaritan pulling an extremely drunken man out of the street onto the sidewalk to avoid him from being run over. Sentence 2: There are cars on the streets.
answer:

A dog walking through the snow.