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:
| Stage | Winner | General classification | Points classification | Mountains classification | Young rider classification |
| --- | --- | --- | --- | --- | --- |
| 1 | Team Columbia-High Road | Mark Cavendish | no award | no award | Mark Cavendish |
| 2 | Alessandro Petacchi | Mark Cavendish | Alessandro Petacchi | David García | Mark Cavendish |
| 3 | Alessandro Petacchi | Alessandro Petacchi | Alessandro Petacchi | Mauro Facci | Tyler Farrar |
| 4 | Stefano Garzelli | Thomas Löfkvist | Alessandro Petacchi | Danilo Di Luca | Thomas Löfkvist |
| 5 | Denis Menchov | Danilo Di Luca | Alessandro Petacchi | Danilo Di Luca | Thomas Löfkvist |
| 6 | Michele Scarponi | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 7 | Edvald Boasson Hagen | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 8 | Kanstantsin Siutsou | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 9 | Mark Cavendish | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 10 | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 11 | Mark Cavendish | Danilo Di Luca | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 12 | Denis Menchov | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 13 | Mark Cavendish | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 14 | Simon Gerrans | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 15 | Leonardo Bertagnolli | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 16 | Carlos Sastre | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 17 | Franco Pellizotti | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 18 | Michele Scarponi | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 19 | Carlos Sastre | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 20 | Philippe Gilbert | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 21 | Ignatas Konovalovas | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| Final | Final | Denis Menchov | Danilo Di Luca Denis Menchov | Stefano Garzelli | Kevin Seeldraeyers |
Question:
What's the points classification of Stage 18 when the general classification was Denis Menchov?
Answer:
Danilo Di Luca