Teaspoon is a type of Spoon. you are likely to find Teaspoon in/at/on Tea. 
Role can be used for Purpose. Purpose is a synonym of Plan. Plan is related to Think. one thing you do when you Working is Think. 
Spoon <--IsA-- Teaspoon --AtLocation--> Tea 
Role --UsedFor--> Purpose <--Synonym--> Plan <--RelatedTo--> Think <--HasSubevent-- Working 