Table:
text: Emilio de Villota
Complete Formula One World Championship results
Complete Formula One World Championship results
Year_ Entrant Chassis Engine Points
1976 RAM Racing Brabham BT44B Cosworth V8 0
1977 Iberia Airlines McLaren M23 Cosworth V8 0
1978 Centro Asegurador McLaren M23 Cosworth V8 0
1981 Banco Occidental Williams FW07 Cosworth V8 0
1982 LBT Team March March 821 Cosworth V8 0

Question: What is the average score of Emilio de Villota earned by Centro Asegurador with the McLaren M23 chassis?

Question: What was the chassis for Emilio de Villota in 1981?