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:
| Date | Tournament | Location | Purse( $ ) | Winner | Score | 1st Prize( $ ) |
| --- | --- | --- | --- | --- | --- | --- |
| Jan 12 | Infiniti Senior Tournament of Champions | California | 350000.0 | Al Geiberger (7) | 282 (-6) | 52500.0 |
| Feb 2 | Royal Caribbean Classic | Florida | 500000.0 | Don Massengale (2) | 205 (-8) | 75000.0 |
| Feb 9 | Aetna Challenge | Florida | 450000.0 | Jimmy Powell (2) | 197 (-19) | 67500.0 |
| Feb 16 | GTE Suncoast Classic | Florida | 450000.0 | Jim Colbert (4) | 200 (-13) | 67500.0 |
| Mar 8 | GTE West Classic | California | 450000.0 | Bruce Crampton (19) | 195 (-15) | 67500.0 |
| Mar 15 | Vantage at The Dominion | Texas | 400000.0 | Lee Trevino (11) | 201 (-15) | 60000.0 |
| Mar 22 | Vintage ARCO Invitational | California | 500000.0 | Mike Hill (11) | 203 (-13) | 75000.0 |
| Apr 5 | The Tradition | Arizona | 800000.0 | Lee Trevino (12) | 274 (-14) | 120000.0 |
| Apr 19 | PGA Seniors' Championship | Florida | 700000.0 | Lee Trevino (13) | 278 (-10) | 100000.0 |
| May 3 | Las Vegas Senior Classic | Nevada | 450000.0 | Lee Trevino (14) | 206 (-10) | 67500.0 |
| May 10 | Murata Reunion Pro-Am | Texas | 400000.0 | George Archer (9) | 211 (-5) | 60000.0 |
| May 17 | Doug Sanders Kingwood Celebrity Classic | Texas | 350000.0 | Mike Hill (12) | 134 (-10) | 52500.0 |
| May 24 | Bell Atlantic Classic | Pennsylvania | 550000.0 | Lee Trevino (15) | 205 (-5) | 82500.0 |
| May 31 | NYNEX Commemorative | New York | 400000.0 | Dale Douglass (8) | 133 (-7) | 60000.0 |
| Jun 7 | PaineWebber Invitational | North Carolina | 450000.0 | Don Bies (6) | 203 (-13) | 67500.0 |
| Jun 14 | Mazda Presents The Senior Players Championship | Michigan | 1000000.0 | Dave Stockton (1) | 277 (-11) | 150000.0 |
| Jun 28 | Southwestern Bell Classic | Missouri | 450000.0 | Gibby Gilbert (1) | 193 (-17) | 67500.0 |
| Jul 5 | Kroger Senior Classic | Ohio | 600000.0 | Gibby Gilbert (2) | 198 (-15) | 90000.0 |
| Jul 12 | U.S. Senior Open | Pennsylvania | 700000.0 | Larry Laoretti (1) | 275 (-9) | 130000.0 |
| Jul 19 | Ameritech Senior Open | Illinois | 500000.0 | Dale Douglass (9) | 201 (-15) | 75000.0 |
| Jul 26 | Newport Cup | Rhode Island | 400000.0 | Jim Dent (7) | 204 (-12) | 60000.0 |
| Aug 2 | Northville Long Island Classic | New York | 450000.0 | George Archer (10) | 205 (-11) | 67500.0 |
| Aug 9 | Digital Seniors Classic | Massachusetts | 500000.0 | Mike Hill (13) | 136 (-8) | 75000.0 |
| Aug 16 | Bruno's Memorial Classic | Alabama | 700000.0 | George Archer (11) | 208 (-8) | 105000.0 |
| Aug 23 | GTE Northwest Classic | Washington | 450000.0 | Mike Joyce (1) | 204 (-12) | 67500.0 |
| Aug 30 | Franklin Showdown Classic | Utah | 400000.0 | Orville Moody (11) | 137 (-7) | 60000.0 |
| Sep 6 | First of America Classic | Michigan | 400000.0 | Gibby Gilbert (3) | 202 (-11) | 60000.0 |
| Sep 13 | Bank One Senior Classic | Kentucky | 500000.0 | Terry Dill (1) | 203 (-11) | 75000.0 |
| Sep 20 | GTE North Classic | Indiana | 450000.0 | Raymond Floyd (1) | 199 (-17) | 67500.0 |
| Sep 27 | Nationwide Championship | Georgia | 800000.0 | Isao Aoki (1) | 136 (-8) | 120000.0 |
| Oct 4 | Vantage Championship | North Carolina | 1500000.0 | Jim Colbert (5) | 132 (-12) | 202500.0 |
| Oct 11 | Raley's Senior Gold Rush | California | 500000.0 | Bob Charles (17) | 201 (-15) | 75000.0 |
| Oct 18 | Transamerica Senior Golf Championship | California | 500000.0 | Bob Charles (18) | 200 (-16) | 75000.0 |
| Oct 25 | Ralphs Senior Classic | California | 600000.0 | Raymond Floyd (2) | 195 (-18) | 90000.0 |
| Nov 1 | Kaanapali Classic | Hawaii | 500000.0 | Tommy Aaron (1) | 198 (-15) | 75000.0 |
| Nov 8 | Ko Olina Senior Invitational | Hawaii | 500000.0 | Chi Chi Rodriguez (21) | 206 (-10) | 75000.0 |
Question:
 what's the date where location is illinois
Answer:
Jul 19