Bias is the opposite of Balance. Balance is related to Equality. Equality is related to Being. 
Age is related to Mark. Mark is related to Excellent. Excellent is related to Grade. 
Bias <--Antonym--> Balance <--RelatedTo--> Equality <--RelatedTo--> Being 
Age <--RelatedTo--> Mark <--RelatedTo--> Excellent <--RelatedTo--> Grade 