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 bundled up for cool weather rides her bike past a street vendor. Sentence 2: A person bundled up for cool weather rides her bike past a street vendor.

SOLUTION: A man bundled up for cool weather rides his bike past a street vendor.

PROBLEM: Sentence 1: People are lying on lounge chairs. Sentence 2: There are humans in chairs.

SOLUTION: People are going for a walk.

PROBLEM: Sentence 1: A dog with a Frisbee in front of a brown dog. Sentence 2: There are two dogs

SOLUTION:
The dogs are playing catch with a tennis ball