Sleeve is related to Piece. Piece is related to Door. Door is related to Simple. 
Boy is related to Seed. Seed is related to Starter. Starter is part of Car. you are likely to find Flat in/at/on Car. 
Sleeve <--RelatedTo--> Piece <--RelatedTo--> Door <--RelatedTo--> Simple 
Boy <--RelatedTo--> Seed <--RelatedTo--> Starter --PartOf--> Car <--AtLocation-- Flat 