user: Question: What is the lowest altitude of the flight with a mach bigger than 0.905 and a duration of 00:06:17?
Columns: ['Vehicle Flight #', 'Date', 'Pilot', 'Mach', 'Velocity (km/h)', 'Altitude (ft)', 'Duration']
Types: ['text', 'text', 'text', 'real', 'real', 'real', 'text']
Sample row: ['M2-F3 #1', 'June 2, 1970', 'Dana', 0.688, 755.0, 45000.0, '00:03:38']
SQL:

assistant: SELECT MIN("Altitude (ft)") FROM "Table" WHERE "Mach" > 0.905 AND "Duration" = '00:06:17';