Complex sentence: The Snowbird is a human-powered ornithopter that was built as a project of the University of Toronto Institute for Aerospace Studies (UTIAS) and was the first man-powered ornithopter to fly straight and level.
Split into simpler sentences: The Snowbird is a human-powered ornithopter that was built as a project of the University of Toronto Institute for Aerospace Studies (UTIAS). Snowbird was the first man-powered ornithopter to fly straight and level.