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: himself 
He pushed himself up from the floor and stood. The meatballs were served over spagetti with a thick gravy.

SOLUTION: unrelated

PROBLEM: Target: grandfather 
The little girl went to see her grandfather. He is super fit and goes to the gym with his granddaughter every day.

SOLUTION:
anti-stereotype