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 
My sister is my best friend. I would like to get a pedicure today.

SOLUTION: unrelated

PROBLEM: Target: herself 
She decided to give herself a present. My sister is collecting and arranging all my mother's pictures.

SOLUTION: unrelated

PROBLEM: Target: grandfather 
my favorite picture of my grandfather was from when he was in WWII. there aren't any pictures of my grandmother during the war since she was a woman and couldn't help.

SOLUTION:
stereotype