user: ### NOW ANSWER:
Question: What is the NOAA of the higher harmonics that have a Darwin of M sf?
Columns: ['Higher harmonics', 'Darwin', 'Period', 'Speed', 'Doodson coefficients', 'NOAA']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Species', 'Symbol', '(hr)', 'rate(°/hr)', 'n 1 (L)', 'order']
SQL:

assistant: SELECT "NOAA" FROM "Table" WHERE "Darwin" = 'M sf';