Involved is related to Exchange. Exchange is related to Rate. Rate is a type of Charge. Charge is a type of Claim. 
Specialist is derived from Specialize. Specialist is related to Doctor. 
Involved <--RelatedTo--> Exchange <--RelatedTo--> Rate --IsA--> Charge --IsA--> Claim 
Specialize <--DerivedFrom-- Specialist <--RelatedTo--> Doctor 