Rhythm is related to Music. Music is related to Speaker. Speaker is related to Machine. Tank is a type of Machine. 
Butterfly is related to Pretty. Pretty is related to Beauty. Glory is a type of Beauty. 
Rhythm <--RelatedTo--> Music <--RelatedTo--> Speaker <--RelatedTo--> Machine <--IsA-- Tank 
Butterfly <--RelatedTo--> Pretty <--RelatedTo--> Beauty <--IsA-- Glory 