Bottom is related to Part. Slice is a type of Part. 
Layer is a type of Artifact. Artifact is related to Cross. Cross is related to Piece. Piece is related to Amount. 
Bottom <--RelatedTo--> Part <--IsA-- Slice 
Layer --IsA--> Artifact <--RelatedTo--> Cross <--RelatedTo--> Piece <--RelatedTo--> Amount 