CREATE TABLE table_34703 ("Date" CLOB, "Tournament" CLOB, "Location" CLOB, "Winner" CLOB, "Score" CLOB, "1st prize  (  $  ) " CLOB)

What is the 1st prize at the U.S. Open?
SELECT "1st prize ( $ )" FROM table_34703 WHERE "Tournament" = 'u.s. open'
SELECT "1st prize ( $ )" FROM "table_34703" WHERE "Tournament" = 'u.s. open'