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:
| Episode # | Prod # | Title | Directed by | Written by | Originalairdate |
| --- | --- | --- | --- | --- | --- |
| 1.0 | 5101.0 | "Six Days" | Cyril Frankel | Gerald Kelsey | 9 March 1969 |
| 2.0 | 5102.0 | "The Trojan Tanker" | Ray Austin | Philip Broadley | 16 March 1969 |
| 3.0 | 5116.0 | "A Cellar Full of Silence" | John Gilling | Terry Nation | 23 March 1969 |
| 4.0 | 5110.0 | "The Pied Piper of Hambledown" | Roy Ward Baker | Donald James | 30 March 1969 |
| 5.0 | 5103.0 | "One of Our Aircraft Is Empty" | Paul Dickson | Tony Williamson | 6 April 1969 |
| 6.0 | 5118.0 | "The Man in the Elegant Room" | Cyril Frankel | Terry Nation | 13 April 1969 |
| 7.0 | 5117.0 | "Handicap Dead" | John Gilling | Philip Broadley | 20 April 1969 |
| 8.0 | 5121.0 | "A Ticket to Nowhere" | Cyril Frankel | Tony Williamson | 27 April 1969 |
| 9.0 | 5115.0 | "Black Out" | Ray Austin | Philip Broadley | 17 September 1969 |
| 10.0 | 5119.0 | "Double Death of Charlie Crippen" | John Gilling | Leslie Darbon | 24 September 1969 |
| 11.0 | 5120.0 | "Who Plays the Dummy" | John Gilling | Tony Williamson | 1 October 1969 |
| 12.0 | 5123.0 | "The Treasure of the Costa del Sol" | John Gilling | Philip Broadley | 8 October 1969 |
| 13.0 | 5107.0 | "The Man Who Got a New Face" | Cyril Frankel | Philip Broadley | 15 October 1969 |
| 14.0 | 5112.0 | "Les Fleurs du Mal" | Cyril Frankel | Philip Broadley | 22 October 1969 |
| 15.0 | 5104.0 | "The Shift That Never Was" | John Gilling | Donald James | 25 October 1969 |
| 16.0 | 5111.0 | "The Man from X" | Gil Taylor | Tony Williamson | 5 November 1969 |
| 17.0 | 5106.0 | "Dead Men Die Twice" | Ray Austin | Philip Broadley | 12 November 1969 |
| 18.0 | 5122.0 | "The Perfect Operation" | Cyril Frankel | Leslie Darbon | 26 November 1969 |
| 19.0 | 5124.0 | "The Duplicated Man" | Paul Dickson | Harry W.Junkin | 3 December 1969 |
| 20.0 | 5113.0 | "The Mysterious Man in the Flying Machine" | Cyril Frankel | Philip Broadley | 10 December 1969 |
| 21.0 | 5108.0 | "Death on Reflection" | Ray Austin | Philip Broadley | 17 December 1969 |
| 22.0 | 5127.0 | "The Last Train to Redbridge" | John Gilling | Gerald Kelsy | 14 January 1970 |
| 23.0 | 5126.0 | "A Small War of Nerves" | Leslie Norman | Harry W.Junkin | 21 January 1970 |
| 24.0 | 5109.0 | "The Bones of Byrom Blain" | Paul Dickson | Tony Williamson | 28 January 1970 |
| 25.0 | 124.0 | "Spencer Bodily is 60 Years Old" | Leslie Norman | Harry W.Junkin | 11 February 1970 |
| 26.0 | 5105.0 | "The Ghost of Mary Burnham" | Cyril Frankel | Harry W.Junkin | 18 February 1970 |
| 27.0 | 5114.0 | "A Fish Out of Water" | Cyril Frankel | Philip Broadley | 25 February 1970 |
Question:
How manu original airdates have "a cellar full of silence" as the title?
Answer:
1.0