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.

Sentence 1: A woman is teaching a kid while cutting. Sentence 2: A woman and a child are together.
A woman is helping an elderly woman cut up vegetables.

Sentence 1: Two children, one wearing purple, the other black, ride a single bike on the pavement. Sentence 2: Two children ride the same bike.
Two adults ride a double seater bike.

Sentence 1: An upset girl sits on a log, head in hands, in front of a bicycle lodged in a tree. Sentence 2: A girl is sad as she looks at a bicycle stuck in a tree.
A happy girl rides her bike near a tree.