user: Question: Pilot of G.V. Alfyorov, and a Record description of Altitude with kg (lb) payload, and a Type of Mi-10 involved what date?
Columns: ['Date', 'Type', 'Record description', 'Achievement', 'Pilot']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['23 September 1961', 'Mi-10', 'Altitude with kg (lb) payload', 'm (ft)', 'G.V. Alfyorov']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Pilot" = 'G.V. Alfyorov' AND "Record description" = 'Altitude with kg (lb) payload' AND "Type" = 'Mi-10';