Exchange is related to Rate. Rate is related to Pay. 
Grass is related to Hay. you are likely to find Hay in/at/on Field. Field is related to Player. Player is related to Musician. 
Exchange <--RelatedTo--> Rate <--RelatedTo--> Pay 
Grass <--RelatedTo--> Hay --AtLocation--> Field <--RelatedTo--> Player <--RelatedTo--> Musician 