Blade is a type of Runner. Blade is related to Instrument. you are likely to find Instrument in/at/on Band. Band is related to Wrist. 
you are likely to find Cat in/at/on Sofa. you are likely to find Cat in/at/on Art. Art is related to Dancer. 
Runner <--IsA-- Blade <--RelatedTo--> Instrument --AtLocation--> Band <--RelatedTo--> Wrist 
Sofa <--AtLocation-- Cat --AtLocation--> Art <--RelatedTo--> Dancer 