2 · Nature
25 · earth, world as celestial body
25F · animals
25F7 · lower animals
25F71 · arthropods
25F711 · insects
25F711(...) · insects (with NAME)
25F711(ANT) · insects: ant
25F711(ANT)(+4) · insects: ant (+ animal behaviour)
25F711(ANT)(+44) · insects: ant (+ relationship between animals)
25F711(ANT)(+441) ·
insects: ant (+ herd, group of animals)