2 · Nature
25 · earth, world as celestial body
25F · animals
25F2 · mammals
25F26 · rodents
25F26(...) · rodents (with NAME)
25F26(BEAVER) · rodents: beaver
25F26(BEAVER)(+3) · rodents: beaver (+ anatomy of animals)
25F26(BEAVER)(+32) · rodents: beaver (+ trunk of an animal)
25F26(BEAVER)(+321) · rodents: beaver (+ sexual organs of an animal)
25F26(BEAVER)(+3211) · rodents: beaver (+ sexual organs of a male animal)