Question: How many model generations did the car Bill Elliott won the 1985 Daytona 500 in have?
Sentence (from "1985 Daytona 500"): The race saw a number of engine problems, which knocked many of the contenders, including former Daytona 500 winners David Pearson, AJ Foyt, Benny Parsons, Bobby Allison, and two-time defending race winner Cale Yarborough, who was trying to win his third straight Daytona 500 victory.
Relevant evidence: No