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:
| Year | Championship | 54 holes | Winning score | Margin | Runner(s)-up |
| --- | --- | --- | --- | --- | --- |
| 1954.0 | The Open Championship | Tied for lead | −9 (72-71-69-71=283) | 1 stroke | Bobby Locke , Dai Rees , Syd Scott |
| 1955.0 | The Open Championship (2) | 1 shot lead | −7 (71-68-70-72=281) | 2 strokes | John Fallon |
| 1956.0 | The Open Championship (3) | 3 shot lead | −2 (70-70-72-74=286) | 3 strokes | Flory Van Donck |
| 1958.0 | The Open Championship (4) | 2 shot lead | −6 (66-72-67-73=278) | Playoff 1 | Dave Thomas |
| 1965.0 | The Open Championship (5) | 1 shot lead | −7 (74-68-72-71=285) | 2 strokes | Christy O'Connor Snr , Brian Huggett |
Question:
What Year had a Runner(s)-up of flory van donck?
Answer:
1956.0