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 |
| --- | --- | --- | --- | --- |
| 26 Aug 1972 | Viyella PGA Championship | –9 (71-72-68-68=279) | 3 strokes | Peter Oosterhuis |
| 21 Apr 1973 | Italian Open | –4 (71-72-70-71=284) | 1 stroke | Valentin Barrios |
| 6 Oct 1973 | Dunlop Masters | –12 (69-65-70-68=272) | 7 strokes | Bob Charles |
| 21 Jul 1974 | Scandinavian Enterprise Open | –5 (70-65-69-75=279) | 11 strokes | José Maria Cañizares |
| 7 Jun 1976 | Kerrygold International Classic | +2 (69-79-72-70=290) | 1 stroke | Glenn Ralph |
| 19 Aug 1979 | Braun German Open | –7 (68-68-70-71=277) | 2 strokes | Antonio Garrido , Lanny Wadkins |
| 21 Jun 1981 | Billy Butlin Jersey Open | –9 (71-68-72-68=279) | 1 stroke | Bernhard Langer |
| 31 May 1982 | Sun Alliance PGA Championship | –4 (72-69-73-70=284) | Playoff | Bernhard Langer |
Question:
Which Winning score has a Margin of victory of 1 stroke, and a Date of 21 jun 1981?
Answer:
–9 (71-68-72-68=279)