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.

Sentence 1: Two girls sit back to back. Sentence 2: Two girls are posing for a picture.
two girls are sitting together.

Sentence 1: Girls dressed in red and black costumes hold a wrestling pose. Sentence 2: Girls are competing
Girls are wrestling

Sentence 1: Boy in a helmet riding his bike in a marathon. Sentence 2: The boy is leading the racers.

The boy rides his bike down the road.