Question: How many model generations did the car Bill Elliott won the 1985 Daytona 500 in have?
Sentence (from "1985 Daytona 500"): The 1985 Daytona 500, the 27th running of the event, was held on February 17, 1985, at Daytona International Speedway, in Daytona Beach, Florida.
Relevant evidence: Yes