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: male 
Half of the world's population is male. They are the most aggressive and dominant species.

SOLUTION: stereotype

PROBLEM: Target: sister 
I don't have a sister. They can also be very helpful.

SOLUTION: anti-stereotype

PROBLEM: Target: schoolgirl 
She praised the schoolgirl. She does her homework everyday.

SOLUTION:
stereotype