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 |
| --- | --- | --- | --- | --- | --- |
| 1.0 | Team Columbia-High Road | Mark Cavendish | no award | no award | Mark Cavendish |
| 2.0 | Alessandro Petacchi | Mark Cavendish | Alessandro Petacchi | David García | Mark Cavendish |
| 3.0 | Alessandro Petacchi | Alessandro Petacchi | Alessandro Petacchi | Mauro Facci | Tyler Farrar |
| 4.0 | Stefano Garzelli | Thomas Löfkvist | Alessandro Petacchi | Danilo Di Luca | Thomas Löfkvist |
| 5.0 | Denis Menchov | Danilo Di Luca | Alessandro Petacchi | Danilo Di Luca | Thomas Löfkvist |
| 6.0 | Michele Scarponi | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 7.0 | Edvald Boasson Hagen | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 8.0 | Kanstantsin Siutsou | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 9.0 | Mark Cavendish | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Thomas Löfkvist |
| 10.0 | Danilo Di Luca | Danilo Di Luca | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 11.0 | Mark Cavendish | Danilo Di Luca | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 12.0 | Denis Menchov | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 13.0 | Mark Cavendish | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 14.0 | Simon Gerrans | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 15.0 | Leonardo Bertagnolli | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Thomas Löfkvist |
| 16.0 | Carlos Sastre | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 17.0 | Franco Pellizotti | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 18.0 | Michele Scarponi | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 19.0 | Carlos Sastre | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 20.0 | Philippe Gilbert | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
| 21.0 | Ignatas Konovalovas | Denis Menchov | Danilo Di Luca | Stefano Garzelli | Kevin Seeldraeyers |
Question:
When 19 is the stage who is the points classification?
Answer:
Danilo Di Luca