Mathematics is related to Language. Language is related to Latin. Latin is a type of Person. 
May is related to Right. Right is the opposite of Obligation. Obligation is related to Requirement. Requirement is related to Must. 
Mathematics <--RelatedTo--> Language <--RelatedTo--> Latin --IsA--> Person 
May <--RelatedTo--> Right <--Antonym--> Obligation <--RelatedTo--> Requirement <--RelatedTo--> Must 