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:
| Rnd | Circuit | AP Winning Team | BP Winning Team | CM Winning Team | CP Winning Team | DM Winning Team | DP Winning Team | EM Winning Team | EP Winning Team | FM Winning Team | FP Winning Team | GM Winning Team | GP Winning Team | HM Winning Team | HP Winning Team | Results |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | Marlboro | Shelby | Chevrolet | Genie- Ford | Porsche | Ferrari | Triumph | Elva - Porsche | Porsche | Elva | Lotus | Lola | Triumph | Osca | Austin-Healey | Results |
| 1 | Marlboro | Charlie Hayes | Robert Mouat | Ed Lowther | Bruce Jennings | Tom O'Brien | Bob Tullius | Skip Scott | Hans Zereis | Dick Young | Bob Sharp | Art Tweedale | Erwin Lorincz | John Gordon | Carl Truitt | Results |
| 2 | VIR | #41 Roger Penske | #1 Chevrolet | #7 Genie- Ford | #77 Porsche | no finishers | #44 Triumph | no entries | #12 Volvo | #3 Lotus | #22 Porsche | #55 Elva | #31 Morgan | #9 Lotus - Saab | #72 Fiat - Abarth | Results |
| 2 | VIR | Mark Donohue | Don Yenko | Ed Lowther | Bruce Jennings | no finishers | Bob Tullius | no entries | Art Riley | Mike Goth | Ron Grable | Roger Donovan | Pete Van der Vate | Ed Walsh | Ron Catalano | Results |
| 3 | Cumberland | #33 Bob Johnson | #11 Don Yenko | #79 William Wissel | #6 Dave Clark | #87 Tom O'Brien | #44 Robert Tullius | #11 Barbara C. Cole | #77 M.A. Russell | #85 Donald E. Wolf | #23 Brooks Noah | Stuart Northrup | #53 R&S Import Motors | #9 Edward Walsh | #33 Carl Truitt | Results |
| 3 | Cumberland | Bob Johnson | Don Yenko | Ed Smith | Dave Clark | Tom O'Brien | Bob Tullius | Skip Scott | Bruce Jennings | Don Wolf | Brooks Noah | Stuart Northrup | Marianne Rollo | Ed Walsh | Carl Truitt | Results |
| 4 | Bridgehampton | Shelby | Chevrolet | #5 Genie- Ford | Lotus | #87 Ferrari | Austin-Healey | #7 Robert Bosch | Porsche | #17 Elva - Ford | Sports Car Forum | Lola | Morgan | Lotus - Saab | Austin-Healey | Results |
| 4 | Bridgehampton | Bob Johnson | Frank Dominianni | William Wonder | Dave Clark | Tom O'Brien | Jim Ladd | Joe Buzzetta | Lake Underwood | Jack Lofland | Don Sesslar | M. R. J. Wyllie | Pete Van der Vate | Ed Walsh | Carl Truitt | Results |
| 5 | Mid-Ohio | Chevrolet | Chevrolet | Gates Chevrolet | Lotus | no entries | Triumph | no entries | #37 Porsche | Elva | Sports Car Forum | Elva | Morgan | Lotus - Saab | Austin-Healey | Results |
| 5 | Mid-Ohio | Dick Lang | Frank Dominianni | Bud Gates | Dave Clark | no entries | Bob Tullius | no entries | Lake Underwood | Ernie Harris | Don Sesslar | Jack Lawrence | Pete Van der Vate | Ed Walsh | Paul Petrun | Results |
| 6 | Road America | Shelby | Chevrolet | Cro-Sal | Porsche | Ferrari | Triumph | Elva - Porsche | Alfa Romeo | Elva | Sports Car Forum | Merlyn- Cosworth | Triumph | Martin T | Austin-Healey | Results |
| 6 | Road America | Bob Johnson | Don Yenko | Ralph Salyer | Bruce Jennings | Dudley Davis | Jim Spencer | Lee Hall | Al Allin | Don Wolf | Don Sesslar | Charles Barns | Bob Clemens | Martin Tanner | Larry Skeels | Results |
| 7 | Lake Garnett | #54 Robert Cross | Dave Dooley | #61 Jack Hinkle | no finishers | no entries | #13 John Goans, Jr. | no entries | #77 Leonard Janke | no finishers | #74 Don Sesslar | #96 Charles Barns | #4 Tommy Allen | #9 Ed Walsh | #56 Richard Alley | Results |
| 7 | Lake Garnett | Bob Cross | Dave Dooley | Jack Hinkle | no finishers | no entries | John Goans | no entries | Leonard Janke | no finishers | Don Sesslar | Charles Barns | Tommy Allen | Ed Walsh | Richard Alley | Results |
| 8 | Lynndale Farms | Shelby | no entries | Cro-Sal | Lotus | Ferrari | Triumph | Elva - Porsche | Porsche | Elva | Lotus | Merlyn- Cosworth | Porsche | Lotus - Saab | Austin-Healey | Results |
| 8 | Lynndale Farms | Bob Johnson | no entries | Ralph Salyer | Dudley Davis | Dudley Davis | Jim Spencer | Lee Hall | Jerry Frydenlund | Don Wolf | Brooks Noah | Charles Barns | Evan Morell | Ed Walsh | Larry Skeels | Results |
| 9 | Watkins Glen | #10 Harold S. Johnston, Jr. | #69 Frank J. Dominianni | #17 Ed Lowther | no finishers | no entries | #59 Krueger Tuned Racing Team | #27 Brad Parker | #17 Hans Zereis | #37 High Performance Cars | #74 Sports Car Forum | #76 Motor Sport Service | #13 Patricia Mernone | #19 John S. Gordon | #6 Fred A. Ingham, Jr. | Results |
| 9 | Watkins Glen | Ed Lowther Bob Nagel | Frank Dominianni Bob Grossman | Ed Lowther | no finishers | no entries | Dave Martin Ernie Donnan | Charlie Hayes | Hans Zereis | Peter Sachs | Don Sesslar | Jack Lawrence | Pete Van der Vate | John Gordon | Fred Ingham | Results |
| 10 | Thompson | Shelby | Chevrolet | Lotus - Porsche | Porsche | no finishers | Austin-Healey | no finishers | Porsche | Brabham - Ford | Triumph | Lotus | Datsun | Bosca | Austin-Healey | Results |
| 10 | Thompson | Harold Keck | Frank Dominianni | Skip Barber | Bruce Jennings | no finishers | Jim Ladd | no finishers | Lake Underwood | Peter Sachs | Bob Tullius | Charles Gibson | Bob Sharp | John Igleheart | Carl Truitt | Results |
| 11 | Lime Rock | Chevrolet | Chevrolet | Ferrari | Porsche | Ferrari | Triumph | no finishers | Porsche | Brabham - Ford | Sunbeam | Lotus | Triumph | Osca | Austin-Healey | Results |
| 11 | Lime Rock | Ken Hall | Bob Brull | Bob Grossman | Bruce Jennings | Tom O'Brien | Chris Noyes | no finishers | Hans Zereis | Peter Sachs | William Kneeland | Charles Gibson | Dick Gilmartin | John Gordon | Gil Page | Results |
| NC | Riverside | #61 Shelby American | #61 Kjell Qvale | #61 Grizzly Engineering | #63 Earl T. Jones | #66 Jerry Titus | #11 Robert C. Tullius | #61 Ralph S. Wood | #62 Scientific Automotive | Rick Muther | #33 Richard J. Hull | #51 Charles A. Barns | #61 Ed Barker | #66 Dan Parkinson | #31 Fredrick W. Salo | Results |
Question:
Who the GM winning team when the EP winning team was #37 Porsche? 
Answer:
Elva