you are likely to find Fork in/at/on Plane. Fork is a type of Form. Form is related to Person. Person is related to Nurse. 
Sand is related to Thing. Thing is related to Boat. you are likely to find Deck in/at/on Boat. 
Plane <--AtLocation-- Fork --IsA--> Form <--RelatedTo--> Person <--RelatedTo--> Nurse 
Sand <--RelatedTo--> Thing <--RelatedTo--> Boat <--AtLocation-- Deck 