Person is related to Donor. Donor is related to Blood. Blood is related to Carrier. 
Canvas is a type of Setting. you are likely to find Canvas in/at/on Museum. you are likely to find Wagon in/at/on Museum. 
Person <--RelatedTo--> Donor <--RelatedTo--> Blood <--RelatedTo--> Carrier 
Setting <--IsA-- Canvas --AtLocation--> Museum <--AtLocation-- Wagon 