Flying is related to Be. Owe is a type of Be. Ought is a form of Owe. Ought is the opposite of Should. 
March is related to Charity. Charity is related to Donate. 
Flying <--RelatedTo--> Be <--IsA-- Owe <--FormOf-- Ought <--Antonym--> Should 
March <--RelatedTo--> Charity <--RelatedTo--> Donate 