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 | Play | Role | Theatre | Location |
| --- | --- | --- | --- | --- |
| 1940.0 | Liliom | Julie | Forty-Fourth Street Theater | New York City , New York |
| 1941.0 | Anna Christie | Anna Christopherson | Lobero Theatre | Santa Barbara, California |
| 1946.0 | Joan of Lorraine | Joan of Arc/Mary Grey | Alvin Theater | New York City , New York |
| 1953.0 | Joan of Arc at the Stake | Joan of Arc | San Carlo Opera House | Naples , Italy |
| 1956.0 | Tea and Sympathy | Laura Reynolds | Théâtre de Paris | Paris , France |
| 1962.0 | Hedda Gabler | Hedda Gabler | Théâtre Montparnasse Gaston Baty | Paris , France |
| 1965.0 | A Month in the Country | Natalia Petrovna | Yvonne Arnaud Theatre | Guildford , United Kingdom |
| 1967.0 | More Stately Mansions | Deborah Harford | Broadhurst Theatre | New York City , New York |
| 1971.0 | Captain Brassbound's Conversion | Lady Cecily Waynflete | Cambridge Theatre | London , United Kingdom |
| 1972.0 | Captain Brassbound's Conversion | Lady Cecily Waynflete | Opera House, Kennedy Center | Washington, D.C. |
| 1973.0 | The Constant Wife | Constance Middleton | Albery Theatre | London , United Kingdom |
| 1975.0 | The Constant Wife | Constance Middleton | Shubert Theatre | New York City , New York |
| 1977.0 | Waters of the Moon | Helen Lancaster | Festival Theatre | Chichester , United Kingdom |
| 1978.0 | Waters of the Moon | Helen Lancaster | Haymarket Theatre | London , United Kingdom |
Question:
Tell me the total number of years for lady cecily waynflete and opera house, kennedy center
Answer:
1.0