Request is related to Offer. Offer is related to Acceptance. Acceptance is a synonym of Adoption. 
Travel requires Map. Circle is a type of Travel. Circle is the opposite of Square. Square is a synonym of Feather. 
Request <--RelatedTo--> Offer <--RelatedTo--> Acceptance <--Synonym--> Adoption 
Map <--HasPrerequisite-- Travel <--IsA-- Circle <--Antonym--> Square <--Synonym--> Feather 