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.

Sentence 1: The troops salute their captain. Sentence 2: the troops are saluting.
a brown dog is sleeping in the sunshine

Sentence 1: A man holds a sign reading "HOMELESS ANYTHING HELPS" near a construction site. Sentence 2: A human with a sign.
Nobody has a sign

Sentence 1: A group of people are waiting for a train to arrive. Sentence 2: The train has not yet arrived.

One person is waiting to skydive.