an Entity references as follows:
The General Motors Firebird comprises a quartet of prototype cars that General Motors (GM) engineered for the 1953, 1956, and 1959 Motorama auto shows. The cars' designers, headed by Harley Earl, took Earl's inspiration from the innovations in fighter aircraft design at the time. General Motors never intended the cars for production, but rather to showcase the extremes in technology and design that the company was able to achieve.