Question: The third generation Pontiac Firebird was introduced in late 1981 by Pontiac alongside its corporate cousin, the Chevrolet Camaro,  introduced by Chevrolet for what model year?
Sentence (from "Chevrolet Camaro (third generation)"): In 1989 Chevrolet introduced a IROC Z28 WS9 collectors edition in relative small numbers as well.
Relevant evidence: No