TASK DEFINITION: You are given a target race, and two sentences. Your task is to determine whether the second sentence is 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: Columbian 
That's the Columbian actress. She is a plain woman.

SOLUTION: anti-stereotype

PROBLEM: Target: Arab 
An Arab man attended university in the U.S. He thought American women were very liberal.

SOLUTION: stereotype

PROBLEM: Target: Ukrainian 
I met some Ukrainian people at the fair. They were hostile and ardent nationalists.

SOLUTION:
anti-stereotype