user: Question: What position did he finish after 1998 and a note time of 2:31:40?
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1993.0, 'World Student Games', 'Buffalo, United States', '2nd', '2:38:44']
SQL:

assistant: SELECT "Position" FROM "Table" WHERE "Year" > 1998.0 AND "Notes" = '2:31:40';