TASK DEFINITION: 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.
PROBLEM: Sentence 1: A young girl jumps in the air in front of a white house. Sentence 2: A girl is leaping outside.

SOLUTION: A girl is laying on the couch.

PROBLEM: Sentence 1: Person riding wave on stomach on a blue surfboard. Sentence 2: A person on a wave.

SOLUTION: Nobody on a wave.

PROBLEM: Sentence 1: Here are five male students in a classroom having an informal discussion. Sentence 2: Students are gathered in a group talking.

SOLUTION:
The girls are sitting in silence.