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.

[EX Q]: Sentence 1: Dog training on the mountain Sentence 2: A dog is taking a class.
[EX A]: A dog is on a mountain.

[EX Q]: Sentence 1: Man works on lowering a train on tracks. Sentence 2: The man works on a life and death situation.
[EX A]: A worker at the trainyard.

[EX Q]: Sentence 1: A male driving a bulldozer to plow green grass and rocks Sentence 2: A man is driving a bulldozer to make way for new construction.
[EX A]:
A man is using a bulldozer.