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:
| № | # | Title | Directed by | Written by | Original air date | Production code | U.S. viewers (millions) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 465.0 | 1.0 | " Elementary School Musical " | Mark Kirkland | Tim Long | September26,2010 | MABF21 | 7.75 |
| 466.0 | 2.0 | " Loan-a Lisa " | Matthew Faughnan | Valentina L. Garza | October3,2010 | MABF17 | 8.59 |
| 467.0 | 3.0 | " MoneyBART " | Nancy Kruse | Tim Long | October10,2010 | MABF18 | 6.72 |
| 469.0 | 5.0 | " Lisa Simpson, This Isn't Your Life " | Matthew Nastuk | Joel H. Cohen | November14,2010 | MABF20 | 8.97 |
| 470.0 | 6.0 | " The Fool Monty " | Steven Dean Moore | Michael Price | November21,2010 | NABF01 | 6.58 |
| 471.0 | 7.0 | " How Munched is That Birdie in the Window? " | Michael Polcino | Kevin Curran | November28,2010 | NABF02 | 9.38 |
| 472.0 | 8.0 | " The Fight Before Christmas " | Bob Anderson & Matthew Schofield | Deb Lacusta & Dan Castellaneta | December5,2010 | MABF22 | 9.54 |
| 473.0 | 9.0 | " Donnie Fatso " | Ralph Sosa | Chris Cluess | December12,2010 | MABF19 | 7.18 |
| 474.0 | 10.0 | " Moms I'd Like to Forget " | Chris Clements | Brian Kelley | January9,2011 | NABF03 | 12.6 |
| 475.0 | 11.0 | " Flaming Moe " | Chuck Sheetz | Matt Selman | January16,2011 | NABF04 | 6.47 |
| 476.0 | 12.0 | " Homer the Father " | Mark Kirkland | Joel H. Cohen | January23,2011 | NABF05 | 6.50 |
| 477.0 | 13.0 | " The Blue and the Gray " | Bob Anderson | Rob LaZebnik | February13,2011 | NABF06 | 5.61 |
| 478.0 | 14.0 | " Angry Dad: The Movie " | Matthew Nastuk | John Frink | February20,2011 | NABF07 | 6.35 |
| 479.0 | 15.0 | " The Scorpion's Tale " | Matthew Schofield | Billy Kimball & Ian Maxtone-Graham | March6,2011 | NABF08 | 6.20 |
| 480.0 | 16.0 | " A Midsummer's Nice Dream " | Steven Dean Moore | Deb Lacusta & Dan Castellaneta | March13,2011 | NABF09 | 5.44 |
| 481.0 | 17.0 | " Love Is a Many Strangled Thing " | Michael Polcino | Bill Odenkirk | March27,2011 | NABF10 | 6.14 |
| 482.0 | 18.0 | " The Great Simpsina " | Chris Clements | Matt Warburton | April10,2011 | NABF11 | 4.99 |
| 483.0 | 19.0 | " The Real Housewives of Fat Tony " | Lance Kramer | Dick Blasucci | May1,2011 | NABF12 | 6.10 |
| 484.0 | 20.0 | " Homer Scissorhands " | Mark Kirkland | Peter Gaffney & Steve Viksten | May8,2011 | NABF13 | 5.48 |
| 485.0 | 21.0 | " 500 Keys " | Bob Anderson | John Frink | May15,2011 | NABF14 | 6.00 |
Question:
How many directors for #15?
Answer:
1.0