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 woman sings while people dance. Sentence 2: A woman is performing.

SOLUTION: A woman is pouring drinks.

PROBLEM: Sentence 1: There are many people sitting or standing on sand, and there is a tractor. Sentence 2: There are many people sitting and standing on sand.

SOLUTION: There are many people sleeping and cooking on sand.

PROBLEM: Sentence 1: a brown and white dog chasing a ball on some grass. Sentence 2: A dog is playing with a ball

SOLUTION:
A dog waits to retrieve a stick