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.

Example Input: Sentence 1: A rollerblader skates down a ramp with his arms in the air. Sentence 2: A rollerblader has his arms in the air.
Example Output: The rollerblader is a girl.

Example Input: Sentence 1: A closeup of a little girl laughing. Sentence 2: Portrait of a happy young girl.
Example Output: A man buying balloons from a street vendor.

Example Input: Sentence 1: A woman with a red jacket is riding a bike. Sentence 2: A woman riding a bicycle.
Example Output:
A man riding a horse.