Queen is related to Bed. Bed is related to Surface. Surface is related to Snow. 
Gray is related to Street. Street is related to Driving. Driving requires License. Charter is a type of License. 
Queen <--RelatedTo--> Bed <--RelatedTo--> Surface <--RelatedTo--> Snow 
Gray <--RelatedTo--> Street <--RelatedTo--> Driving --HasPrerequisite--> License <--IsA-- Charter 