Pay is related to Exchange. Exchange is related to Give. Spare is a type of Give. 
Hall is related to Bar. Bar is related to Celebration. Celebration is related to Parade. Parade is a synonym of Troop. 
Pay <--RelatedTo--> Exchange <--RelatedTo--> Give <--IsA-- Spare 
Hall <--RelatedTo--> Bar <--RelatedTo--> Celebration <--RelatedTo--> Parade <--Synonym--> Troop 