user: Question: Name the least morse taper number when taper is 1:20.047
Columns: ['Morse Taper number', 'Taper', 'A', 'B (max)', 'C (max)', 'D (max)', 'E (max)', 'F', 'G', 'H', 'J', 'K']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: [0.0, '1:19.212', '9.045', '56.5', '59.5', '10.5', '6', 4.0, '1', '3', '3.9', '1° 29\' 27"']
SQL:

assistant: SELECT MIN("Morse Taper number") FROM "Table" WHERE "Taper" = '1:20.047';