user: Question: What launched has Mariner 4 as the spacecraft?
Columns: ['Spacecraft', 'Destination', 'Launched', 'Closest approach', 'Time elapsed']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Venera 1', 'Venus', '12 February 1961', '19 May 1961', '97 days (3 months, 8 days)']
SQL:

assistant: SELECT "Launched" FROM "Table" WHERE "Spacecraft" = 'Mariner 4';