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 |
| --- | --- | --- | --- | --- | --- | --- |
| 63.0 | 1.0 | "The Unsterile Cuckoo" | Rob Thompson | David E. Kelley | November2,1989 | 7D01 |
| 64.0 | 2.0 | "Captain Hurt" | Win Phelps | William M. Finkelstein | November9,1989 | 7D02 |
| 65.0 | 3.0 | "When Irish Eyes Are Smiling" | David Carson | David E. Kelley and William M. Finkelstein | November16,1989 | 7D03 |
| 66.0 | 4.0 | "The Mouse That Soared" | Sandy Smolan | David E. Kelley and William M. Finkelstein | November23,1989 | 7D04 |
| 67.0 | 5.0 | "One Rat, One Ranger" | Tom Moore | Douglas McGrath | November30,1989 | 7D05 |
| 68.0 | 6.0 | "Lie Down and Deliver" | Gabrielle Beaumont | Christopher Keyser & Harry Lippman | December7,1989 | 7D06 |
| 69.0 | 7.0 | "Placenta Claus Is Coming to Town" | Rob Thompson | William M. Finkelstein and Cynthia Saunders | December14,1989 | 7D07 |
| 70.0 | 8.0 | "The Good Human Bar" | Johanna Demetrakas | David E. Kelley and Cynthia Saunders | January4,1990 | 7D08 |
| 71.0 | 9.0 | "Noah's Bark" | Win Phelps | David E. Kelley and William M. Finkelstein | January11,1990 | 7D09 |
| 74.0 | 12.0 | "On Your Honor" | Steven Robman | David E. Kelley and William M. Finkelstein | February8,1990 | 7D12 |
| 76.0 | 14.0 | "Ex-Wives and Videotapes" | Miles Watkins | David E. Kelley and William M. Finkelstein | February22,1990 | 7D14 |
| 77.0 | 15.0 | "Blood, Sweat and Fears" | Edwin Sherin | David E. Kelley | March15,1990 | 7D15 |
| 78.0 | 16.0 | "Bounds for Glory" | Win Phelps | David E. Kelley and William M. Finkelstein | March22,1990 | 7D16 |
| 79.0 | 17.0 | "Justice Swerved" | Menachem Binetski | David E. Kelley and Bryce Zabel | March29,1990 | 7D17 |
| 80.0 | 18.0 | "Watts a Matter?" | Tom Moore | David E. Kelley and Bryce Zabel | April5,1990 | 7D18 |
| 81.0 | 19.0 | "Bang... Zoom... Zap" | Miles Watkins | David E. Kelley and William M. Finkelstein | April26,1990 | 7D19 |
| 83.0 | 21.0 | "Outward Bound" | Edwin Sherin | David E. Kelley and William M. Finkelstein | May10,1990 | 7D21 |
Question:
How many episodes directed by david carson?
Answer:
1.0