instruction:
In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair 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 guy wearing a black shirt and a red hat riding his skateboard. Sentence 2: A guy is riding a skateboard.
answer:
A guy is riding a scooter.


question:
Sentence 1: A small boy enjoys chasing ducks in the fall. Sentence 2: A child plays with an animal.
answer:
A boy plays with his puppy.


question:
Sentence 1: A group of teenagers play music at an outdoor event. Sentence 2: There are many people gathered.
answer:

Teenagers are taking a test.