user: Question: Name the launch date for duration days 174.14
Columns: ['Expedition', 'Crew', 'Launch date', 'Flight up', 'Landing date', 'Flight down', 'Duration (days)']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Mir EO-1', 'Leonid Kizim Vladimir Solovyov', '13 March 1986 12:33 UTC', 'Soyuz T-15', '16 July 1986 12:34 UTC', 'Soyuz T-15', '125.00 75 on Mir']
SQL:

assistant: SELECT "Launch date" FROM "Table" WHERE "Duration (days)" = '174.14';