CREATE TABLE table_5421 ("Date" TEXT, "Tournament" TEXT, "Location" TEXT, "Winner" TEXT, "Score" TEXT, "1st prize  (  $  ) " FLOAT)

What is the date of the sprint international tournament where the first prize was 216,000 dollars?
SELECT "Date" FROM table_5421 WHERE "1st prize ( $ )" > '216,000' AND "Tournament" = 'sprint international'
SELECT "Date" FROM "table_5421" WHERE "1st prize ( $ )" > '216,000' AND "Tournament" = 'sprint international'