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: schoolboy 
I have known him since he was a schoolboy. He hated learning and was content in cutting classes.

SOLUTION: anti-stereotype

PROBLEM: Target: schoolboy 
The schoolboy waited for the bus. He wore a uniform and cap.

SOLUTION: stereotype

PROBLEM: Target: gentlemen 
When they were together, they were seen as a group of gentlemen. War is not a means to peace.

SOLUTION:
unrelated