CREATE TABLE table_14359 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "Margin of victory" CLOB, "Runner ( s ) -up" CLOB)

What date did Ian poulter become runner up?
SELECT "Date" FROM table_14359 WHERE "Runner(s)-up" = 'ian poulter'
SELECT "Date" FROM "table_14359" WHERE "Runner(s)-up" = 'ian poulter'