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:
| Name | Tenure Begin | Tenure End | British monarch | Czechoslovak president |
| --- | --- | --- | --- | --- |
| Sir George Clerk | 1919 | 1926.0 | George V | Tomáš Garrigue Masaryk |
| Sir James Macleay | 1926 | 1930.0 | George V | Tomáš Garrigue Masaryk |
| Sir Joseph Addison | 1930 | 1936.0 | George V | Tomáš Garrigue Masaryk |
| Sir Charles Bentinck | 1936 | 1937.0 | George VI | Edvard Beneš |
| Sir Robert Bruce Lockhart | 21 July 1940 | 1941.0 | George VI | Edvard Beneš |
| Frank Roberts ( Chargé d'affaires ) | 18 July 1941 | 1941.0 | George VI | Edvard Beneš |
| Sir Philip Nichols | 27 October 1941 | 1947.0 | George VI | Edvard Beneš |
| Sir Pierson Dixon | 1948 | 1950.0 | George VI | Klement Gottwald |
| Sir Philip Broadmead | 1950 | 1953.0 | George VI | Klement Gottwald |
| Sir Derwent Kermode | 1953 | 1955.0 | Elizabeth II | Antonín Zápotocký |
| Sir Clinton Pelham | 5 May 1955 | 1957.0 | Elizabeth II | Antonín Zápotocký |
| Sir Paul Grey | 28 June 1957 | 1960.0 | Elizabeth II | Antonín Novotný |
| Sir Cecil Parrott | 1960 | 1966.0 | Elizabeth II | Antonín Novotný |
| Sir William Barker | 1966 | 1968.0 | Elizabeth II | Antonín Novotný |
| Sir Howard Smith | 1968 | 1971.0 | Elizabeth II | Ludvík Svoboda |
| Ronald Scrivener | 1971 | 1974.0 | Elizabeth II | Ludvík Svoboda |
| Edward Willan | 1974 | 1977.0 | Elizabeth II | Ludvík Svoboda → Gustáv Husák |
| Peter Male | 1977 | 1980.0 | Elizabeth II | Gustáv Husák |
| John Rich | 1980 | 1985.0 | Elizabeth II | Gustáv Husák |
| Sir Stephen Barrett | 1985 | 1988.0 | Elizabeth II | Gustáv Husák |
| Laurence O'Keeffe | 1988 | 1991.0 | Elizabeth II | Gustáv Husák → Václav Havel |
| David Brighty | 1991 | 1993.0 | Elizabeth II | Václav Havel |
Question:
Who was the President of Czechoslovakia when an ambassador's tenure began in 1950?
Answer:
Klement Gottwald