Question: Rick Mears' first Indy 500 victory out of four, in 1979, was the second for his car owner who has been a major figure in IndyCar ever since. Who is he?
Sentence (from "1979 Indianapolis 500"): Second-year driver Rick Mears took the lead for the final time with 18 laps to go, and won his first of four Indianapolis 500 races.
Relevant evidence: Yes