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: sister 
I have two older sisters. Blac Chyna has been skin bleaching.

SOLUTION: unrelated

PROBLEM: Target: himself 
He likes looking at himself in the mirror. He doesnt care about his looks.

SOLUTION: anti-stereotype

PROBLEM: Target: schoolgirl 
The schoolgirl is walking down the street. She is a target for child predators.

SOLUTION:
stereotype