Complex sentence: Herodotus wrote of the man-eating Stymphalian birds, which had wings of brass and sharp metallic feathers they could fire at their victims; ridding Lake Stymphalia in Arcadia of these creatures was one of the twelve labours of Heracles.
Split into simpler sentences: Herodotus wrote of the man-eating Stymphalian birds, which had wings of brass and sharp metallic feathers they could fire at their victims. Ridding Lake Stymphalia in Arcadia of these creatures was one of the twelve labours of Heracles.