Envelope is part of Balloon. Child wants (to) Balloon. Silly is a type of Child. 
Agency is related to Firm. Firm is a synonym of Corporation. Corporation is related to Entity. 
Envelope --PartOf--> Balloon <--Desires-- Child <--IsA-- Silly 
Agency <--RelatedTo--> Firm <--Synonym--> Corporation <--RelatedTo--> Entity 