What is 1991 indy 500?

Here's information about the 1991 Indianapolis 500, formatted in Markdown:

1991 Indianapolis 500

The 1991 Indianapolis 500 was the 75th running of the annual race, held at the Indianapolis Motor Speedway on Sunday, May 26, 1991.

• Winner: The race was won by Rick Mears driving for Penske Racing. This marked Mears' fourth Indy 500 victory, tying him with A.J. Foyt and Al Unser Sr. at the time.

• Pole Position: Gary Bettenhausen surprisingly won the pole position. This was the first pole for the Bettenhausen family.

• Race Summary: The race saw numerous lead changes and several incidents. Michael Andretti dominated much of the race. A late-race yellow flag set up a thrilling duel between Mears and Michael Andretti.

• Duel: Rick Mears passed Michael Andretti on the outside of turn one with just over 12 laps remaining, a move that is now considered legendary.

• Significance: The 1991 race is remembered for its exciting finish and Rick Mears's impressive drive to secure his fourth victory. It was also a notable race as it featured a strong challenge from the younger generation of drivers like Michael Andretti.