Hold is a different concept from Drop. Drop is related to Reference. Reference is a synonym of Mention. 
Fair is related to Celebration. Balloon can be used for Celebration. Balloon is related to Head. 
Hold <--DistinctFrom--> Drop <--RelatedTo--> Reference <--Synonym--> Mention 
Fair <--RelatedTo--> Celebration <--UsedFor-- Balloon <--RelatedTo--> Head 