TASK DEFINITION: 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.
PROBLEM: Sentence 1: A group of female musicians is playing in front of a building with an open instrument case in front of them. Sentence 2: A group of female musicians are playing and looking for money from passersby.

SOLUTION: A female music group is playing for tips.

PROBLEM: Sentence 1: A vendor sits in the middle of a display of glasses at a street market in an Asian country. Sentence 2: A vendor joyously sits

SOLUTION: A vendor sits

PROBLEM: Sentence 1: A class full of students. Sentence 2: A class full of students listening to a lecture.

SOLUTION:
There is a class full of students.