CREATE TABLE table_471 ("Year" CLOB, "Champion" CLOB, "Country" CLOB, "Score" CLOB, "Tournament location" CLOB, "Purse  ( $ ) " FLOAT, "Winners share  ( $ ) " FLOAT)

What is the year that Dewi Claire Schreefel is the champion?
SELECT "Year" FROM table_471 WHERE "Champion" = 'Dewi Claire Schreefel'
SELECT "Year" FROM "table_471" WHERE "Champion" = 'Dewi Claire Schreefel'