In this task, you're given a pair of sentences, sentence 1 and sentence 2. Sentence 2 contradicts sentence 1. Your job is to alter sentence 2 so that the pair neither agree nor 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: Children sit at the top of a cement wall. Sentence 2: Children sit on an iron fence.
Example Output: Children watch a bird from a cement wall.

Example Input: Sentence 1: A boy jumps on his skateboard while a crowd watches Sentence 2: A boy is sitting on his skateboard on the ground.
Example Output: A skater is wearing a helmet.

Example Input: Sentence 1: Two girls, wearing protective goggles, in a laboratory going through a book. Sentence 2: The girls are dissecting a frog.
Example Output:
The book is about chemistry.