Seat is a type of Support. Support is related to Assistance. Assistance is related to Service. Utility is a type of Service. 
Bubble is related to Level. Level is a type of Destroy. Destroy is the opposite of Preserve. 
Seat --IsA--> Support <--RelatedTo--> Assistance <--RelatedTo--> Service <--IsA-- Utility 
Bubble <--RelatedTo--> Level --IsA--> Destroy <--Antonym--> Preserve 