Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Round | Circuit | Location | Date | Pole position | Fastest lap | Winning driver | Winning team | Supporting |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Sebring International Raceway | Sebring, Florida | March 19 | Anders Krohn | Anders Krohn | Tristan Vautier | Andersen Racing | American Le Mans Series |
| 2.0 | Streets of St. Petersburg | St. Petersburg, Florida | March 28 | Conor Daly | Conor Daly | Conor Daly | Juncos Racing | IndyCar Series |
| 3.0 | Mazda Raceway Laguna Seca | Monterey, California | May 23 | Conor Daly | Connor De Phillippi | Conor Daly | Juncos Racing | American Le Mans Series |
| 4.0 | O'Reilly Raceway Park | Clermont, Indiana | May 29 | Mikaël Grenier | Conor Daly | Conor Daly | Juncos Racing | USAC National Midget Series |
| 5.0 | Iowa Speedway | Newton, Iowa | June 19 | Conor Daly | Conor Daly | Conor Daly | Juncos Racing | IndyCar Series |
| 6.0 | New Jersey Motorsports Park | Millville, New Jersey | June 26 | Conor Daly | Conor Daly | Caio Lara | JDC MotorSports | stand-alone |
| 7.0 | New Jersey Motorsports Park | Millville, New Jersey | June 27 | Conor Daly | João Victor Horto | Tristan Vautier | Andersen Racing | stand-alone |
| 8.0 | Autobahn Country Club | Joliet, Illinois | July 31 | Mikaël Grenier | Conor Daly | Mikaël Grenier | Andersen Racing | stand-alone |
| 9.0 | Autobahn Country Club | Joliet, Illinois | August 1 | Conor Daly | Conor Daly | Conor Daly | Juncos Racing | stand-alone |
| 10.0 | Circuit Trois-Rivières | Trois-Rivières, Québec | August 15 | Conor Daly | Alex Ardoin | Alex Ardoin | Team GDT | Continental Tire Sports Car Challenge |
| 11.0 | Road America | Elkhart Lake, Wisconsin | August 21 | Conor Daly | Conor Daly | Conor Daly | Juncos Racing | American Le Mans Series |
| 12.0 | Mosport International Raceway | Bowmanville, Ontario | August 28 | Conor Daly | Connor De Phillippi | Conor Daly | Juncos Racing | American Le Mans Series |
Question:
What circuit was used on August 21?
Answer:
Road America