CREATE TABLE table_35771 ("Year" FLOAT, "Champion" CLOB, "Venue" CLOB, "Location" CLOB, "Score" CLOB)

When did Kim Thompson win with 278 score?
SELECT SUM("Year") FROM table_35771 WHERE "Score" = '278' AND "Champion" = 'kim thompson'
SELECT SUM("Year") FROM "table_35771" WHERE "Champion" = 'kim thompson' AND "Score" = '278'