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( $ ) |
| --- | --- | --- | --- | --- | --- | --- |
| Feb 10 | Sunrise Senior Classic | Florida | 200000.0 | Miller Barber (15) | 211 (-5) | 30000.0 |
| Mar 17 | The Vintage Invitational | California | 300000.0 | Peter Thomson (3) | 280 (-7) | 40000.0 |
| Mar 24 | Senior PGA Tour Roundup | Arizona | 200000.0 | Don January (15) | 198 (-18) | 30000.0 |
| Mar 31 | American Golf Carta Blanca Johnny Mathis Classic | California | 250000.0 | Peter Thomson (4) | 205 (-11) | 37500.0 |
| May 5 | MONY Senior Tournament of Champions | California | 100000.0 | Peter Thomson (5) | 284 (-4) | 30000.0 |
| May 12 | Dominion Seniors | Texas | 200000.0 | Don January (16) | 206 (-10) | 30000.0 |
| May 19 | United Hospitals Senior Golf Championship | Pennsylvania | 200000.0 | Don January (17) | 135 (-5) | 30000.0 |
| Jun 2 | Denver Post Champions of Golf | Colorado | 200000.0 | Lee Elder (3) | 213 (-3) | 30000.0 |
| Jun 9 | The Champions Classic | Nevada | 200000.0 | Peter Thomson (6) | 210 (-6) | 30000.0 |
| Jun 16 | Senior Players Reunion Pro-Am | Texas | 175000.0 | Peter Thomson (7) | 204 (-12) | 26000.0 |
| Jun 23 | Senior Tournament Players Championship | Ohio | 240000.0 | Arnold Palmer (9) | 274 (-14) | 36000.0 |
| Jun 30 | U.S. Senior Open | Nevada | 225000.0 | Miller Barber (16) | 285 (-3) | 40199.0 |
| Jul 6 | The Greenbrier American Express Championship | West Virginia | 200000.0 | Don January (18) | 200 (-16) | 30000.0 |
| Jul 21 | MONY Syracuse Senior's Classic | New York | 200000.0 | Peter Thomson (8) | 204 (-9) | 30000.0 |
| Jul 28 | Merrill Lynch/Golf Digest Commemorative Pro-Am | Rhode Island | 175000.0 | Lee Elder (4) | 133 (-11) | 27000.0 |
| Aug 4 | Digital Seniors Classic | Massachusetts | 200000.0 | Lee Elder (5) | 208 (-8) | 30000.0 |
| Aug 18 | du Maurier Champions | Canada | 225000.0 | Peter Thomson (9) | 203 (-13) | 23794.0 |
| Sep 1 | Citizens Union Senior Golf Classic | Kentucky | 200000.0 | Lee Elder (6) | 135 (-7) | 30000.0 |
| Sep 15 | United Virginia Bank Seniors | Virginia | 250000.0 | Peter Thomson (10) | 207 (-9) | 37500.0 |
| Sep 22 | PaineWebber World Seniors Invitational | North Carolina | 200000.0 | Miller Barber (17) | 277 (-11) | 30000.0 |
| Oct 13 | Hilton Head Seniors International | South Carolina | 200000.0 | Mike Fetchick (1) | 210 (-6) | 30000.0 |
| Oct 20 | Barnett Suntree Senior Classic | Florida | 165000.0 | Peter Thomson (11) | 207 (-9) | 24750.0 |
| Oct 27 | Seiko-Tucson Senior Match Play Championship | Arizona | 300000.0 | Harold Henning (1) | 4 & 3 | 75000.0 |
Question:
What are all the dates with a score of 203 (-13)?
Answer:
Aug 18