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 young boy plays on a playground piece shaped like a seahorse. Sentence 2: A little boy playing in a playground.
Example Output: A little boy swinging on a swingset.

Example Input: Sentence 1: Hispanic woman hanging out her window with small boy. Sentence 2: A woman holds her small boy in a window.
Example Output: An old man sits in a windowsill with is cat.

Example Input: Sentence 1: One little boy working hard in his martial arts class. Sentence 2: Someone is training.
Example Output:
There is no class in session.