Musical is related to Organ. Organ is related to Skin. Skin is related to Lemon. Lemon is related to Salt. 
Function is related to Wing. Wing can be used for Bug. 
Musical <--RelatedTo--> Organ <--RelatedTo--> Skin <--RelatedTo--> Lemon <--RelatedTo--> Salt 
Function <--RelatedTo--> Wing --UsedFor--> Bug 