Hole is related to Pocket. you are likely to find Key in/at/on Pocket. Key is a type of Pitch. 
Musical is related to Sing. Sing is a different concept from Double. Double is related to Starting. Starting is related to One. 
Hole <--RelatedTo--> Pocket <--AtLocation-- Key --IsA--> Pitch 
Musical <--RelatedTo--> Sing <--DistinctFrom--> Double <--RelatedTo--> Starting <--RelatedTo--> One 