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:
| Year | Entrant | Class | Chassis | Engine | Rank | Points |
| --- | --- | --- | --- | --- | --- | --- |
| 1999.0 | Champion Racing | LMP | Porsche 911 GT1 Evo | Porsche 3.2L Turbo Flat-6 | 25th | 47 |
| 2000.0 | Audi Sport North America | LMP | Audi R8 | Audi 3.6L Turbo V8 | 1st | 270 |
| 2000.0 | Audi Sport North America | LMP | Audi R8R | Audi 3.6L Turbo V8 | 1st | 270 |
| 2004.0 | Audi Sport UK Team Veloqx | LMP1 | Audi R8 | Audi 3.6L Turbo V8 | 7th | 26 |
| 2005.0 | ADT Champion Racing | LMP1 | Audi R8 | Audi 3.6L Turbo V8 | 10th | 22 |
| 2006.0 | Audi Sport North America | LMP1 | Audi R10 TDI | Audi 5.5L Turbo V12 ( Diesel ) | 1st | 204 |
| 2006.0 | Audi Sport North America | LMP1 | Audi R8 | Audi 3.6L Turbo V8 | 1st | 204 |
| 2007.0 | Audi Sport North America | LMP1 | Audi R10 TDI | Audi 5.5L Turbo V12 ( Diesel ) | 1st | 246 |
| 2008.0 | Audi Sport North America | LMP1 | Audi R10 TDI | Audi 5.5L Turbo V12 ( Diesel ) | 8th | 60 |
| 2009.0 | Audi Sport Team Joest | LMP1 | Audi R15 TDI | Audi 5.5L Turbo V10 ( Diesel ) | 10th | 30 |
| 2010.0 | Audi Sport Team Joest | LMP1 | Audi R15 TDI plus | Audi 5.5L Turbo V10 ( Diesel ) | NC | – |
| 2011.0 | Audi Sport Team Joest | LMP1 | Audi R15 TDI plus | Audi 5.5L Turbo V10 ( Diesel ) | NC | – |
| 2011.0 | Audi Sport Team Joest | LMP1 | Audi R18 TDI | Audi 3.7L Turbo V6 ( Diesel ) | NC | – |
Question:
Which class has a year prior to 2011 and audi r15 tdi as the chassis?
Answer:
LMP1