Represent is a type of Serve. Draw is a type of Represent. 
Reliable is similar to Certain. Certain is related to Opinion. Bias is a type of Opinion. Racism is a type of Bias. 
Serve <--IsA-- Represent <--IsA-- Draw 
Reliable <--SimilarTo--> Certain <--RelatedTo--> Opinion <--IsA-- Bias <--IsA-- Racism 