Complex sentence: Fabre Hydravion is the name used in English-language sources for the originally unnamed experimental floatplane designed by Henri Fabre, notable as the first aircraft to take off from water under its own power.
Split into simpler sentences: Fabre Hydravion is the name used in English-language sources for an originally unnamed experimental floatplane designed by Henri Fabre. The aircraft is notable as the first to take off from water under its own power.