user: Question: The EVA that started on 8 July 12:38 went for how long?
Columns: ['Start Date/Time', 'Duration', 'End Time', 'Spacecraft', 'Crew']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['20 February 20:09', '4 hours 12 minutes', '21 February 00:21', 'Mir EO-10 Kvant-2', 'Aleksandr Volkov Sergei Krikalyov']
SQL:

assistant: SELECT "Duration" FROM "Table" WHERE "Start Date/Time" = '8 July 12:38';