Pitcher is a type of Leaf. Leaf is a type of Company. 
Cliff is related to Hill. Hill is related to Pile. Pile is a type of Illness. Illness is related to Pain. 
Pitcher --IsA--> Leaf --IsA--> Company 
Cliff <--RelatedTo--> Hill <--RelatedTo--> Pile --IsA--> Illness <--RelatedTo--> Pain 