user: Question: Which archive has a run time of 23:48?
Columns: ['Episode', 'Broadcast date', 'Run time', 'Viewers (in millions)', 'Archive']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['" Episode 1 "', '23December1967', '23:45', '6.8', '16mm t/r']
SQL:

assistant: SELECT "Archive" FROM "Table" WHERE "Run time" = '23:48';