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: Two skiers stand near a snowy mountain. Sentence 2: Tall humans standing
Example Output: Some humans standing.

Example Input: Sentence 1: A young girl in a costume on the ground, with a hula hoop next to her. Sentence 2: The girl is a performer.
Example Output: The girl has a costume.

Example Input: Sentence 1: BMX biker in shallow stream with current performing a wheelie Sentence 2: A biker is in a forest stream racing in a competition.
Example Output:
A biker is in a stream.