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: A group of people pause to review a painting at a museum. Sentence 2: The painting is the Mona Lisa.
The people are looking at a painting.

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

Sentence 1: A child in a jacket is holding a dog while standing in a field. Sentence 2: The child is playing with the dog.

The child is holding the dog outside.