Table:
text: 1981–82 USAC Championship Car season
Schedule and results
Schedule and results
Rnd Date_ Race_Name Length_ Track Location_ Type_ Pole_Position Winning_Driver
1 May 24, 1981 Indianapolis 500-Mile Race mi (km) Indianapolis Motor Speedway Speedway , Indiana Paved oval Bobby Unser Bobby Unser
2 June 21, 1981 Van Scoy Diamond Mines 500 mi (km) Pocono International Raceway Long Pond , Pennsylvania Paved oval A. J. Foyt A. J. Foyt
3 August 15, 1981 Tony Bettenhausen 100 mi (km) Illinois State Fairgrounds Springfield , Illinois Dirt oval Tom Bigelow George Snider
4 August 30, 1981 DuQuoin 100 mi (km) DuQuoin State Fairgrounds Du Quoin , Illinois Dirt oval Bill Engelhart Rich Vogler
5 September 12, 1981 Hoosier Hundred mi (km) grounds Indiana State Fair Indianapolis , Indiana Dirt oval Larry Rice Larry Rice

Question: Considering the 1981–82 USAC Championship Car season, who had pole position in the August 15, 1981 race?

Question: What track was used on September 12, 1981 by the 1981–82 USAC Championship Car season?