Skin is a type of Bag. Skin is related to Leg. Leg is related to Human. you are likely to find Human in/at/on Elevator. 
you are likely to find Water in/at/on Bottle. Water is the opposite of Rock. Rock is related to Diamond. Diamond is a type of Stone. 
Bag <--IsA-- Skin <--RelatedTo--> Leg <--RelatedTo--> Human --AtLocation--> Elevator 
Bottle <--AtLocation-- Water <--Antonym--> Rock <--RelatedTo--> Diamond --IsA--> Stone 