You will be given a definition of a task first, then some input of the task.
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: An old bearded man is tilling the soil with a simple wooden plow, with a wooden fence and an old barn in the background. Sentence 2: A bearded farmer tills his garden.
Output:
An old bearded man is tilling the gravel.