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:
| School | Mascot | Location | Founded | Entered ISL | Grades | Number of Students | Varsity Teams |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Belmont Hill School | No Mascot (Sextant is school symbol) | Belmont, MA | 1923.0 | 1948.0 | 7-12 | 420 Boys | 16.0 |
| Brooks School | Bishops | North Andover, MA | 1926.0 | 1948.0 | 9-12 | 368 | 22.0 |
| Buckingham Browne & Nichols | Knights | Cambridge, MA | 1883.0 | 1948.0 | pre-K-12 | 997 | 16.0 |
| Governor's Academy | Red Dogs | Byfield, MA | 1763.0 | 1948.0 | 9-12 | 376 | 20.0 |
| Groton School | Zebras | Groton, MA | 1884.0 | 1972.0 | 8-12 | 352 | 19.0 |
| Lawrence Academy at Groton | Spartans | Groton, MA | 1793.0 | 1973.0 | 9-12 | 375 | 22.0 |
| Middlesex School | Zebras | Concord, MA | 1901.0 | 1968.0 | 9-12 | 350 | 24.0 |
| Milton Academy | Mustangs | Milton, MA | 1798.0 | 1948.0 | K-12 | 680 | 25.0 |
| Noble and Greenough School | Bulldogs | Dedham, MA | 1866.0 | 1948.0 | 7-12 | 525 | 25.0 |
| Rivers School | Red Wings | Weston, MA | 1915.0 | 1973.0 | 6-12 | 450 | 16.0 |
| Roxbury Latin School | Foxes | West Roxbury, MA | 1645.0 | 1974.0 | 7-12 | 290 Boys | 10.0 |
| St. George's School | Dragons | Middletown, RI | 1896.0 | 1981.0 | 9-12 | 345 | 24.0 |
| St. Mark's School | Lions | Southborough, MA | 1865.0 | 1948.0 | 9-12 | 325 | 22.0 |
| St. Paul's School | Pelicans (teams are cheered for as "Big Red") | Concord, NH | 1856.0 | 1973.0 | 9-12 | 533 | 17.0 |
| St. Sebastian's School | Arrows | Needham, MA | 1941.0 | 1973.0 | 7-12 | 350 Boys | 14.0 |
Question:
when was lawrence academy at groton established? 
Answer:
1793.0