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 | Winner | Score | 1st prize ( $ ) |
| --- | --- | --- | --- | --- | --- |
| Jan 6 | Bing Crosby National Pro-Am | California | Johnny Miller (4) | 208 (–8) | 27,750 |
| Jan 13 | Phoenix Open | Arizona | Johnny Miller (5) | 271 (–13) | 30,000 |
| Jan 20 | Dean Martin Tucson Open | Arizona | Johnny Miller (6) | 272 (–16) | 30,000 |
| Jan 27 | Andy Williams-San Diego Open Invitational | California | Bobby Nichols (10) | 275 (–13) | 34,000 |
| Feb 3 | Hawaiian Open | Hawaii | Jack Nicklaus (53) | 271 (–17) | 44,000 |
| Feb 10 | Bob Hope Desert Classic | California | Hubert Green (4) | 341 (–19) | 32,048 |
| Feb 17 | Glen Campbell-Los Angeles Open | California | Dave Stockton (7) | 276 (–8) | 30,000 |
| Feb 24 | Jackie Gleason-Inverrary Classic | Florida | Leonard Thompson (1) | 278 (–10) | 52,000 |
| Mar 3 | Florida Citrus Open | Florida | Jerry Heard (4) | 273 (–15) | 30,000 |
| Mar 10 | Doral-Eastern Open | Florida | Bud Allin (3) | 272 (–16) | 30,000 |
| Mar 17 | Greater Jacksonville Open | Florida | Hubert Green (5) | 276 (–12) | 30,000 |
| Mar 24 | Sea Pines Heritage Classic | South Carolina | Johnny Miller (7) | 276 (–8) | 40,000 |
| Mar 31 | Greater New Orleans Open | Louisiana | Lee Trevino (18) | 267 (–21) | 30,000 |
| Apr 7 | Greater Greensboro Open | North Carolina | Bob Charles (6) | 270 (–14) | 44,066 |
| Apr 14 | Masters Tournament | Georgia | Gary Player (19) | 278 (–10) | 35,000 |
| Apr 21 | Monsanto Open | Florida | Lee Elder (1) | 274 (–10) | 30,045 |
| Apr 28 | Tallahassee Open | Florida | Allen Miller (1) | 274 (–14) | 18,000 |
| Apr 28 | Tournament of Champions | California | Johnny Miller (8) | 280 (–8) | 40,000 |
| May 5 | Byron Nelson Golf Classic | Texas | Bud Allin (4) | 269 (–15) | 30,045 |
| May 12 | Houston Open | Texas | Dave Hill (11) | 276 (–12) | 30,000 |
| May 19 | Colonial National Invitation | Texas | Rod Curl (1) | 276 (–4) | 50,000 |
| May 26 | Danny Thomas Memphis Classic | Tennessee | Gary Player (20) | 273 (–15) | 35,000 |
| Jun 2 | Kemper Open | North Carolina | Bob Menne (1) | 270 (–18) | 50,000 |
| Jun 9 | IVB-Philadelphia Golf Classic | Pennsylvania | Hubert Green (6) | 271 (–17) | 30,000 |
| Jun 16 | U.S. Open | New York | Hale Irwin (3) | 287 (+7) | 35,000 |
| Jun 23 | American Golf Classic | Ohio | Jim Colbert (4) | 281 (+1) | 34,000 |
| Jun 30 | Western Open | Illinois | Tom Watson (1) | 287 (+3) | 40,000 |
| Jul 6 | Greater Milwaukee Open | Wisconsin | Ed Sneed (2) | 276 (–12) | 26,000 |
| Jul 13 | British Open | Scotland | Gary Player (21) | 282 (–2) | 13,200 |
| Jul 14 | Quad Cities Open | Iowa | Dave Stockton (8) | 271 (–13) | 20,000 |
| Jul 21 | B.C. Open | New York | Richie Karl (1) | 273 (–11) | 30,000 |
| Jul 28 | Canadian Open | Canada | Bobby Nichols (11) | 270 (–10) | 40,000 |
| Aug 4 | Pleasant Valley Classic | Massachusetts | Victor Regalado (1) | 278 (–6) | 40,000 |
| Aug 11 | PGA Championship | North Carolina | Lee Trevino (19) | 276 (–4) | 45,000 |
| Aug 18 | Sammy Davis Jr.-Greater Hartford Open | Connecticut | Dave Stockton (9) | 268 (–12) | 40,000 |
| Aug 25 | Westchester Classic | New York | Johnny Miller (9) | 269 (–19) | 50,000 |
| Sep 2 | Tournament Players Championship | Georgia | Jack Nicklaus (54) | 272 (–16) | 50,000 |
| Sep 8 | Southern Open | Georgia | Forrest Fezler (1) | 271 (–9) | 20,000 |
| Sep 15 | World Open Golf Championship | North Carolina | Johnny Miller (10) | 281 (–3) | 60,000 |
| Sep 22 | Ohio Kings Island Open | Ohio | Miller Barber (9) | 277 (–7) | 30,000 |
| Sep 29 | Kaiser International Open Invitational | California | Johnny Miller (11) | 271 (–17) | 30,000 |
| Oct 6 | Sahara Invitational | Nevada | Al Geiberger (5) | 273 (–11) | 27,000 |
| Oct 20 | San Antonio Texas Open | Texas | Terry Diehl (1) | 269 (–19) | 25,000 |
| Nov 3 | Walt Disney World National Team Championship | Florida | Hubert Green (7) Mac McLendon (1) | 255 (–33) | 25,000 (each) |
Question:
What date was the Monsanto open located in Florida?
Answer:
Apr 21