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 skateboarder wearing a black t-shirt and black pants is in front of the red brick building. Sentence 2: The skateboarder is in front a building.
The skateboarder is inside the building knocking on the door.

Sentence 1: A homeless man is kneeling in the street and begging for money. Sentence 2: A man is panhandling.
A lawyer is prosecuting a case in a courtroom.

Sentence 1: A man in a denim shirt is turning a Fender Telecaster with lights behind him. Sentence 2: A man with a denim shirt is turning a Fender telecaster with lights behind him.

The guy is in the crowd at the concert.