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 12 | Phoenix Open | Arizona | Johnny Miller (12) | 260 (–24) | 30,000 |
| Jan 19 | Dean Martin Tucson Open | Arizona | Johnny Miller (13) | 263 (–25) | 40,000 |
| Jan 26 | Bing Crosby National Pro-Am | California | Gene Littler (26) | 280 (–8) | 37,000 |
| Feb 2 | Hawaiian Open | Hawaii | Gary Groh (1) | 274 (–14) | 44,000 |
| Feb 9 | Bob Hope Desert Classic | California | Johnny Miller (14) | 339 (–21) | 32,000 |
| Feb 16 | Andy Williams-San Diego Open Invitational | California | J. C. Snead (4) | 279 (–9) | 34,000 |
| Feb 23 | Glen Campbell-Los Angeles Open | California | Pat Fitzsimons (1) | 275 (–9) | 30,000 |
| Mar 2 | Jackie Gleason-Inverrary Classic | Florida | Bob Murphy (4) | 273 (–15) | 52,000 |
| Mar 9 | Florida Citrus Open | Florida | Lee Trevino (20) | 276 (–12) | 40,000 |
| Mar 16 | Doral-Eastern Open | Florida | Jack Nicklaus (55) | 276 (–12) | 30,000 |
| Mar 23 | Greater Jacksonville Open | Florida | Larry Ziegler (2) | 276 (–12) | 30,000 |
| Mar 30 | Sea Pines Heritage Classic | South Carolina | Jack Nicklaus (56) | 271 (–13) | 40,000 |
| Apr 6 | Greater Greensboro Open | North Carolina | Tom Weiskopf (11) | 275 (–9) | 45,000 |
| Apr 13 | Masters Tournament | Georgia | Jack Nicklaus (57) | 276 (–12) | 40,000 |
| Apr 20 | Pensacola Open | Florida | Jerry McGee (1) | 271 (–13) | 25,000 |
| Apr 27 | MONY Tournament of Champions | California | Al Geiberger (6) | 277 (–11) | 40,000 |
| Apr 27 | Tallahassee Open | Florida | Rik Massengale (1) | 274 (–14) | 12,000 |
| May 4 | Houston Open | Texas | Bruce Crampton (14) | 273 (–15) | 30,000 |
| May 12 | Byron Nelson Golf Classic | Texas | Tom Watson (2) | 269 (–19) | 35,000 |
| May 18 | First NBC New Orleans Open | Louisiana | Billy Casper (51) | 271 (–17) | 30,000 |
| May 25 | Danny Thomas Memphis Classic | Tennessee | Gene Littler (27) | 270 (–18) | 35,000 |
| Jun 1 | Atlanta Classic | Georgia | Hale Irwin (4) | 271 (–17) | 45,000 |
| Jun 8 | Kemper Open | North Carolina | Raymond Floyd (6) | 278 (–10) | 50,000 |
| Jun 15 | IVB-Philadelphia Golf Classic | Pennsylvania | Tom Jenkins (1) | 275 (–9) | 30,000 |
| Jun 23 | U.S. Open | Illinois | Lou Graham (3) | 287 (+3) | 40,000 |
| Jun 30 | Western Open | Illinois | Hale Irwin (5) | 283 (–1) | 40,000 |
| Jul 5 | Greater Milwaukee Open | Wisconsin | Art Wall, Jr. (14) | 271 (–17) | 26,000 |
| Jul 13 | British Open | Scotland | Tom Watson (3) | 279 (–9) | 16,500 |
| Jul 13 | Ed McMahon-Jaycees Quad Cities Open | Illinois | Roger Maltbie (1) | 275 (–9) | 15,000 |
| Jul 20 | Pleasant Valley Classic | Massachusetts | Roger Maltbie (2) | 276 (–8) | 40,000 |
| Jul 27 | Canadian Open | Canada | Tom Weiskopf (12) | 274 (–6) | 40,000 |
| Aug 3 | Westchester Classic | New York | Gene Littler (28) | 271 (–17) | 50,000 |
| Aug 10 | PGA Championship | Ohio | Jack Nicklaus (58) | 276 (–4) | 45,000 |
| Aug 17 | Sammy Davis Jr.-Greater Hartford Open | Connecticut | Don Bies (1) | 267 (–17) | 40,000 |
| Aug 24 | Tournament Players Championship | Texas | Al Geiberger (7) | 270 (–10) | 50,000 |
| Sep 1 | B.C. Open | New York | Don Iverson (1) | 274 (–10) | 35,000 |
| Sep 7 | Southern Open | Georgia | Hubert Green (8) | 264 (–16) | 20,000 |
| Sep 14 | World Open Golf Championship | North Carolina | Jack Nicklaus (59) | 280 (–4) | 40,000 |
| Sep 28 | Sahara Invitational | Nevada | Dave Hill (12) | 270 (–14) | 27,000 |
| Oct 5 | Kaiser International Open Invitational | California | Johnny Miller (15) | 272 (–16) | 35,000 |
| Oct 19 | San Antonio Texas Open | Texas | Don January (9) | 275 (–13) | 25,000 |
| Oct 26 | Walt Disney World National Team Championship | Florida | Jim Colbert (5) Dean Refram (2) | 252 (–36) | 20,000 (each) |
Question:
What is the tournament on Apr 6?
Answer:
Greater Greensboro Open