Partnership is a type of Relationship. Relationship is related to Peer. Peer is related to Pressure. 
Oak is related to Large. Large is related to Wall. you are likely to find Tile in/at/on Wall. Tile is part of Roof. 
Partnership --IsA--> Relationship <--RelatedTo--> Peer <--RelatedTo--> Pressure 
Oak <--RelatedTo--> Large <--RelatedTo--> Wall <--AtLocation-- Tile --PartOf--> Roof 