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 large group of people are in the middle of a field. Sentence 2: There is a large group of men in the middle of the field.
Example Output: There is a large group of people in the middle of the field.

Example Input: Sentence 1: Man driving a red Coca-Cola truck by palm trees. Sentence 2: The man is making a delivery.
Example Output: Someone is driving a vehicle.

Example Input: Sentence 1: A crowd surrounds a grounded hot air balloon. Sentence 2: Crowd watching someone fly away
Example Output:
Crowd gathering