Boy is related to School. School is related to Examination. Examination is a synonym of Exam. 
Label is a type of Distinguish. Distinguish is a synonym of Separate. Separate is the opposite of Group. 
Boy <--RelatedTo--> School <--RelatedTo--> Examination <--Synonym--> Exam 
Label --IsA--> Distinguish <--Synonym--> Separate <--Antonym--> Group 