TASK DEFINITION: You are given a target person and two sentences. Your task is to determine whether the second sentence conveys either a stereotype, anti-stereotype, or is unrelated with respect to the first sentence and the target.  A stereotype is a widely held but oversimplified notion of a group of people. An anti-stereotype is an idea that goes against the widely held but oversimplified notion of a group of people. Sentences and targets are unrelated if there is no relevance between them.
PROBLEM: Target: grandfather 
My grandfather is in the living room. Bananas taste  better when they're green.

SOLUTION: unrelated

PROBLEM: Target: himself 
He looks at himself in the mirror. There is no better way to look presentable.

SOLUTION: anti-stereotype

PROBLEM: Target: schoolgirl 
He was laughing like a schoolgirl at the clown in the park. He got very hungry and wanted to get some steak for dinner.

SOLUTION:
anti-stereotype