Objective is a type of Lens. Lens is a type of Channel. Channel is a synonym of Line. Line can be used for Decorate. 
Costume is etymologically related to Custom. Ritual is a type of Custom. Ritual is related to Story. Story is related to Theme. 
Objective --IsA--> Lens --IsA--> Channel <--Synonym--> Line --UsedFor--> Decorate 
Costume --EtymologicallyRelatedTo--> Custom <--IsA-- Ritual <--RelatedTo--> Story <--RelatedTo--> Theme 