Wash is a type of Separate. Wash is related to Spin. Spin is related to Roll. 
Dancing requires Rhythm. Dancing is related to Follow. Follow is related to Walk. 
Separate <--IsA-- Wash <--RelatedTo--> Spin <--RelatedTo--> Roll 
Rhythm <--HasPrerequisite-- Dancing <--RelatedTo--> Follow <--RelatedTo--> Walk 