CREATE TABLE table_35293 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What is the winning scor of the tournament with Robin Walton as the runner-up?
SELECT "Winning score" FROM table_35293 WHERE "Runner(s)-up" = 'robin walton'
SELECT "Winning score" FROM "table_35293" WHERE "Runner(s)-up" = 'robin walton'