TASK DEFINITION: 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.
PROBLEM: Sentence 1: A man wearing colorful clothing and white sunglasses is playing a large drum with his hands. Sentence 2: The man is near a drum.

SOLUTION: The man begins to play the guitar.

PROBLEM: Sentence 1: People setting up to sell on the street their food. Sentence 2: People are getting ready to sell their goods.

SOLUTION: People are running away.

PROBLEM: Sentence 1: Two little puppies chase each other on a stone wall. Sentence 2: Two dogs running outside.

SOLUTION:
Two dogs are fighting with each other.