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: A person is falling off their surfboard. Sentence 2: A person falls from their surfboard in a competition.
Example Output: A person falls.

Example Input: Sentence 1: A door in a tall concrete wall Sentence 2: A door in a wall of at stone building.
Example Output: A door in a wall.

Example Input: Sentence 1: A family prepares to ride on the water. Sentence 2: the family getting on a boat.
Example Output:
The people in the family are by the water getting ready to take a ride.