Complex sentence: The Common Gallinule ("Gallinula galeata") is a bird in the Rallidae family that was split from the Common Moorhen by the American Ornithologists' Union in July 2011.
Split into simpler sentences: The Common Gallinule ("Gallinula galeata") is a bird in the Rallidae family. It was split from the Common Moorhen by the American Ornithologists' Union in July 2011.