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 | Winning score | Margin of victory | Runner(s)-up |
| --- | --- | --- | --- | --- |
| Sep 28, 1986 | Southwest Golf Classic | –13 (68-70-66-71=275) | 3 strokes | Tom Byrum |
| Mar 8, 1987 | Honda Classic | –9 (69-72-68-70=279) | 3 strokes | Bernhard Langer , Payne Stewart |
| Sep 18, 1988 | Bank of Boston Classic | –10 (71-67-70-66=274) | 1 stroke | Don Pooley |
| Jan 22, 1989 | Phoenix Open | –21 (66-68-65-64=263) | 7 strokes | Chip Beck |
| Feb 5, 1989 | Nissan Los Angeles Open | –12 (68-66-70-68=272) | 1 stroke | Sandy Lyle |
| Jul 23, 1989 | The Open Championship | –13 (71-68-68-68=275) | Playoff | Wayne Grady , Greg Norman |
| Jan 26, 1992 | Phoenix Open | –20 (69-65-67-63=264) | 5 strokes | Duffy Waldorf |
| May 7, 1995 | BellSouth Classic | –17 (67-69-69-66=271) | 2 strokes | Jim Gallagher, Jr. |
| Aug 24, 1997 | Greater Vancouver Open | –19 (68-66-65-66=265) | 1 stroke | Andrew Magee |
| Mar 15, 1998 | Honda Classic | –18 (70-67-68-65=270) | 3 strokes | Vijay Singh |
| Jan 28, 2001 | Phoenix Open | –28 (65-60-64-67=256) | 8 strokes | Rocco Mediate |
| Sep 11, 2005 | Bell Canadian Open | –5 (65-67-72-71=275) | 1 stroke | Ben Crane , Ryan Moore |
| Mar 11, 2007 | PODS Championship | –10 (75-67-62-70=274) | 1 stroke | John Senden , Heath Slocum |
Question:
What was the Margin of victory in the southwest golf classic Tournament?
Answer:
3 strokes