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 young girl playing clarinet in a musical group. Sentence 2: A girl playing clarinet in a musical group.
An old girl playing clarinet in a musical group.

Sentence 1: A boy selling lemonade for$ 1 rides his bike with no hands as he advertises his product to a long line of people. Sentence 2: The  boy is selling lemonade for a $1.
A boy selling cookies to a group of people.

Sentence 1: Two men from opposing teams jump and reach high in the air in an attempt to grab a Frisbee. Sentence 2: Two men try to grab a frisbee.

Two women try to grab a frisbee.