Complex sentence: Zunum Aero (Mayan for hummingbird) is a Kirkland, Washington based aircraft manufacturer startup, backed by Boeing HorizonX and JetBlue Technology Ventures, working since 2013 on a hybrid electric family of 10-50-seat regional aircraft.
Split into simpler sentences: Zunum Aero (Mayan for hummingbird) is an aircraft manufacturer startup based in Kirkland, Washington. Backed by Boeing HorizonX and JetBlue Technology Ventures, the company has been working since 2013 on a family of 10-to 50-seat hybrid electric regional aircraft.