user: Question: Name the manager for playoffs of Missed for 1999
Columns: ['Year', 'Record', 'Finish', 'Manager', 'Playoffs']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['GCL Orioles (1991–2003)', 'GCL Orioles (1991–2003)', 'GCL Orioles (1991–2003)', 'GCL Orioles (1991–2003)', 'GCL Orioles (1991–2003)']
SQL:

assistant: SELECT "Manager" FROM "Table" WHERE "Playoffs" = 'Missed' AND "Year" = '1999';