Complex sentence: The NextEV NIO EP9 is a track-only, electric-powered, mid-engined supercar manufactured by the NextEV Formula E Team, which made its debut in the Saatchi Gallery in London, England.
Split into simpler sentences: The NextEV NIO EP9 is a track-only, electric-powered, mid-engined supercar manufactured by NextEV and their Formula E counterpart. It made its debut in the Saatchi Gallery in London, England.