In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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: Dog training on the mountain Sentence 2: A dog is taking a class.
Example Output: A dog is on a mountain.

Example Input: Sentence 1: Children play with a remote-control boat in a pond with a boat house. Sentence 2: Childern crash the boat.
Example Output: Childern are playing

Example Input: Sentence 1: A teen in a yellow shirt directs his team on a sports field. Sentence 2: The high school football quarterback is calling an audible.
Example Output:
A teen in a yellow shirt directs his team.