Complex sentence: The beak, up to 30 cm long, is black and broad, slightly upturned, ending in a sharp point Plumage is mostly white; the head and upper neck are black, with a red stretchable pouch at the base.
Split into simpler sentences: The beak, up to 30 cm long, is black and broad, slightly upturned, ending in a sharp point. The plumage is mostly white, but the head and upper neck are black, with a red stretchable pouch at the base.