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:
| No. in series | No. in season | Title | Directed by | Written by | Original air date | Production code |
| --- | --- | --- | --- | --- | --- | --- |
| 47.0 | 1.0 | "Knight of the Drones (Part 1)" | Sidney Hayers | Robert Foster & Gerald Sanford | September30,1984 | 58675.0 |
| 48.0 | 2.0 | "Knight of the Drones (Part 2)" | Sidney Hayers | Robert Foster & Gerald Sanford | September30,1984 | 58676.0 |
| 49.0 | 3.0 | "The Ice Bandits" | Georg Fenady | Gerald Sanford | October7,1984 | 58603.0 |
| 50.0 | 4.0 | "Knights of the Fast Lane" | Winrich Kolbe | Richard C. Okie | October14,1984 | 58601.0 |
| 51.0 | 5.0 | "Halloween Knight" | Winrich Kolbe | Bill Nuss | October28,1984 | 58624.0 |
| 52.0 | 6.0 | "K.I.T.T. vs. K.A.R.R." | Winrich Kolbe | Richard C. Okie | November4,1984 | 58617.0 |
| 53.0 | 7.0 | "The Rotten Apples" | Bob Bralver | Gerald Sanford & Peter L. Dixon | November11,1984 | 58611.0 |
| 54.0 | 8.0 | "Knight in Disgrace" | Harvey Laidman | Simon Muntner | November18,1984 | 58622.0 |
| 56.0 | 10.0 | "Lost Knight" | Sidney Hayers | Robert Foster & James M. Miller | December9,1984 | 58619.0 |
| 57.0 | 11.0 | "Knight of the Chameleon" | Winrich Kolbe | Robert Sherman | December30,1984 | 58631.0 |
| 58.0 | 12.0 | "Custom Made Killer" | Harvey Laidman | Burton Armus | January6,1985 | 58640.0 |
| 59.0 | 13.0 | "Knight by a Nose" | Bernard McEveety | William Elliot | January13,1985 | 58604.0 |
| 60.0 | 14.0 | "Junk Yard Dog" | Georg Fenady | Calvin Clements Jr. | February3,1985 | 58641.0 |
| 61.0 | 15.0 | "Buy Out" | Jeffrey Hayden | George S. Dinallo | February10,1985 | 58643.0 |
| 62.0 | 16.0 | "Knightlines" | Charles Watson Sanford | Richard C. Okie | March3,1985 | 58644.0 |
| 63.0 | 17.0 | "The Nineteenth Hole" | Georg Fenady | Gerald Sanford & Robert Foster | March10,1985 | 58627.0 |
| 64.0 | 18.0 | "Knight & Knerd" | Georg Fenady | Larry Mollin | March17,1985 | 58630.0 |
| 65.0 | 19.0 | "Ten Wheel Trouble" | Bob Bralver | Burton Armus | March24,1985 | 58645.0 |
| 66.0 | 20.0 | "Knight in Retreat" | Roy Campanella II | Gerald Sanford | March29,1985 | 58642.0 |
| 67.0 | 21.0 | "Knight Strike" | Georg Fenady | George S. Dinallo | April5,1985 | 58647.0 |
Question:
How many different pairs of writers wrote the episode with series number 56?
Answer:
1.0