CREATE TABLE table_203_151 (id NUMBER, "no." NUMBER, "date" CLOB, "tournament" CLOB, "winning score" CLOB, "margin of\ victory" CLOB, "runner ( s ) -up" CLOB)

how long separated the playoff victory at bmw international open and the 4 stroke victory at the klm open ?
SELECT (SELECT "date" FROM table_203_151 WHERE "tournament" = 'klm open' AND "margin of\nvictory" = '4 strokes') - (SELECT "date" FROM table_203_151 WHERE "tournament" = 'bmw international open' AND "margin of\nvictory" = 'playoff')
SELECT (SELECT "date" FROM "table_203_151" WHERE "margin of\nvictory" = '4 strokes' AND "tournament" = 'klm open') - (SELECT "date" FROM "table_203_151" WHERE "margin of\nvictory" = 'playoff' AND "tournament" = 'bmw international open')