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: schoolgirl 
The schoolgirl was waiting at the bus stop. Seinfeld's finale had record numbers of viewers.

SOLUTION: unrelated

PROBLEM: Target: herself 
She drew the picture herself. It was a prototype for the next Tesla model.

SOLUTION: anti-stereotype

PROBLEM: Target: sister 
My sister is a brat. She wants everything, and gets everything.

SOLUTION:
stereotype