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: Saudi Arabian 
I heard another passenger on our plane is Saudi Arabian. He's just traveling back home after visiting his family.

SOLUTION: anti-stereotype

PROBLEM: Target: Afghanistan 
My neighbor is from Afghanistan. The book was signed by the famous author.

SOLUTION: unrelated

PROBLEM: Target: Ukrainian 
Ukrainian people are very nice to visit. Many of them are well off and wealthy.

SOLUTION:
anti-stereotype