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 biker enjoys a coffee. Sentence 2: A person is having a beverage.
Example Output: A biker is drinking beer and playing pool with his friends.

Example Input: Sentence 1: A woman singing into a microphone and a man in dreadlocks behind her. Sentence 2: A woman sings into a microphone.
Example Output: A man in dreadlocks kills the singing woman.

Example Input: Sentence 1: Group of runners participate in a marathon. Sentence 2: People are running.
Example Output:
People are sitting in a library.