CREATE TABLE table_4568 ("Higher harmonics" CLOB, "Darwin" CLOB, "Period" CLOB, "Speed" CLOB, "Doodson coefficients" CLOB, "NOAA" CLOB)

What is the NOAA of the higher harmonics that have a Darwin of m sf?
SELECT "NOAA" FROM table_4568 WHERE "Darwin" = 'm sf'
SELECT "NOAA" FROM "table_4568" WHERE "Darwin" = 'm sf'