Medicine can Cargo. you are likely to find Cargo in/at/on Ship. Ship is a type of Travel. 
Afford is related to Effort. Effort is related to Put. Seat is a type of Put. 
Medicine --CapableOf--> Cargo --AtLocation--> Ship --IsA--> Travel 
Afford <--RelatedTo--> Effort <--RelatedTo--> Put <--IsA-- Seat 