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 |
| --- | --- | --- | --- | --- | --- | --- |
| 50.0 | 1.0 | "Bring 'Em Back Alive" | Jay Sandrich | Matt Williams | September 25, 1986 | 301.0 |
| 51.0 | 2.0 | "Food for Thought" | Jay Sandrich | John Markus | October 2, 1986 | 302.0 |
| 52.0 | 3.0 | "Golden Anniversary" | Jay Sandrich | Carmen Finestra | October 9, 1986 | 303.0 |
| 53.0 | 4.0 | "Man Talk" | Jay Sandrich | John Markus | October 16, 1986 | 305.0 |
| 54.0 | 5.0 | "Mother, May I?" | Jay Sandrich | Susan Fales | October 23, 1986 | 304.0 |
| 55.0 | 6.0 | "The March" | Tony Singletary | Gary Kott | October 30, 1986 | 306.0 |
| 56.0 | 7.0 | "Theo's Flight" | Tony Singletary | Gary Kott | November 6, 1986 | 307.0 |
| 57.0 | 8.0 | "Vanessa's Rich" | Tony Singletary | Margaret Beddow Hatch | November 13, 1986 | 308.0 |
| 58.0 | 9.0 | "Denise Gets a D" | Jay Sandrich | Matt Geller | November 20, 1986 | 309.0 |
| 59.0 | 10.0 | "A Girl and Her Dog" | Jay Sandrich | Chris Auer | December 4, 1986 | 312.0 |
| 60.0 | 11.0 | "War Stories" | Jay Sandrich | Matt Robinson | December 11, 1986 | 310.0 |
| 61.0 | 12.0 | "Cliff in Charge" | Jay Sandrich | Matt Williams | December 18, 1986 | 311.0 |
| 62.0 | 13.0 | "Monster Man Huxtable" | Jay Sandrich | Gary Kott | January 8, 1987 | 313.0 |
| 63.0 | 14.0 | "Rudy Spends the Night" | Jay Sandrich | Carmen Finestra | January 15, 1987 | 314.0 |
| 64.0 | 15.0 | "Say Hello to a Good Buy" | Tony Singletary | John Markus & Carmen Finestra & Matt Williams | January 22, 1987 | 315.0 |
| 65.0 | 16.0 | "Denise Gets an Opinion" | Tony Singletary | Gary Kott | February 5, 1987 | 316.0 |
| 66.0 | 17.0 | "Calling Doctor Huxtable" | Jay Sandrich | Chris Auer | February 12, 1987 | 317.0 |
| 67.0 | 18.0 | "You Only Hurt the One You Love" | Jay Sandrich | John Markus & Carmen Finestra | February 19, 1987 | 318.0 |
| 68.0 | 19.0 | "The Shower" | Jay Sandrich | Matt Williams | February 26, 1987 | 319.0 |
| 69.0 | 20.0 | "Cliff's 50th Birthday" | Carl Lauten & Regge Life | Gary Kott | March 12, 1987 | 320.0 |
| 70.0 | 21.0 | "I Know That You Know" | Jay Sandrich | John Markus & Carmen Finestra & Matt Williams | March 19, 1987 | 321.0 |
| 71.0 | 22.0 | "The Andalusian Flu" | Jay Sandrich | Janet Leahy | April 2, 1987 | 322.0 |
| 72.0 | 23.0 | "Bald and Beautiful" | Tony Singletary | Gary Kott | April 9, 1987 | 324.0 |
| 73.0 | 24.0 | "Planning Parenthood" | Jay Sandrich | Elizabeth Hailey & Oliver Hailey | April 30, 1987 | 326.0 |
Question:
Who wrote the episode titled "man talk"?
Answer:
John Markus