Visit is related to Pain. Pain is related to Physical. Physical is related to Force. Force is related to Wave. 
Bone is related to Tissue. Tissue is related to Blood. Blood is related to Vessel. Pitcher is a type of Vessel. 
Visit <--RelatedTo--> Pain <--RelatedTo--> Physical <--RelatedTo--> Force <--RelatedTo--> Wave 
Bone <--RelatedTo--> Tissue <--RelatedTo--> Blood <--RelatedTo--> Vessel <--IsA-- Pitcher 