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 3 February 4 |
| Exxon Superflo 12 Hours of Sebring | 12 Hours | All | Sebring International Raceway | March 17 |
| Advance Auto Parts Grand Prix of Atlanta | 40 Minutes | GTS-2 | Road Atlanta | April 21 |
| Advance Auto Parts Grand Prix of Atlanta | 3 Hours | WSC/GTS-1 | Road Atlanta | April 21 |
| Exxon Superflo 500 at Texas | 500 Miles | All | Texas World Speedway | May 5 |
| The Dodge Dealers Grand Prix | 1 Hour | GTS-2 | Lime Rock Park | May 27 |
| The Dodge Dealers Grand Prix | 1 Hour 45 Minutes | WSC/GTS-1 | Lime Rock Park | May 27 |
| First Union Six Hours at the Glen | Six Hours | All | Watkins Glen International | June 9 |
| Toshiba California Grand Prix | 45 Minutes | GTS-2 | Sears Point Raceway | July 14 |
| Toshiba California Grand Prix | 3 Hours | WSC/GTS-1 | Sears Point Raceway | July 14 |
| Chrysler Mosport 500 | 3 Hours | All | Mosport International Raceway | August 25 |
| Sprint Grand Prix of Dallas | 45 Minutes | GTS-2 | Dallas street circuit | September 1 |
| Sprint Grand Prix of Dallas | 2 Hours | WSC/GTS-1 | Dallas street circuit | September 1 |
| Daytona IMSA Finale | 3 Hours | All | Daytona International Speedway | October 6 |
Question:
What is the length of the First Union six hours at the Glen?
Answer:
Six Hours