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:
| Race | Length | Class | Circuit | Date |
| --- | --- | --- | --- | --- |
| Rolex 24 at Daytona | 24 Hours | All | Daytona International Speedway | February 4 February 5 |
| Exxon MasterCard 12 Hours of Sebring | 12 Hours | All | Sebring International Raceway | March 18 |
| Rain-X/ Motorola Grand Prix of Atlanta | 3 Hours | All | Road Atlanta | April 30 |
| Moosehead Grand Prix | 3 Hours | All | Halifax Circuit | May 21 |
| The Dodge Dealers Grand Prix of Lime Rock | 1 Hour | GTS | Lime Rock Park | May 29 |
| The Dodge Dealers Grand Prix of Lime Rock | 1 Hour 45 Minutes | WSC | Lime Rock Park | May 29 |
| The Glen Continental | 3 Hours | All | Watkins Glen International | June 24 |
| Apple Computer Inc. California Grand Prix | 1 Hour | GTS-2 | Sears Point Raceway | July 16 |
| Apple Computer Inc. California Grand Prix | 1 Hour 45 Minutes | WSC/GTS-1 | Sears Point Raceway | July 16 |
| Chrysler Mosport 500 | 3 Hours | All | Mosport International Raceway | August 13 |
| Seitel Texas World Grand Prix | 3 Hours | All | Texas World Speedway | September 10 |
| Exxon World Sports Car Championships | 1 Hour | GTS-2 | Phoenix International Raceway | September 30 |
| Exxon World Sports Car Championships | 2 Hours | WSC/GTS-1 | Phoenix International Raceway | September 30 |
| Acxiom Grand Prix du Mardi Gras | 1 Hour | GTS-2 | New Orleans street course | October 8 |
| Acxiom Grand Prix du Mardi Gras | 1 Hour 45 Minutes | WSC/GTS-1 | New Orleans street course | October 8 |
Question:
Name the length for all class and date of march 18
Answer:
12 Hours