CREATE TABLE table_57213 ("Year" TEXT, "Champion" TEXT, "Score" TEXT, "Runner-Up" TEXT, "Location" TEXT, "Semi-Finalist #1" TEXT, "Semi-Finalist #2" TEXT)

Who won when Elon was the runner-up?
SELECT "Champion" FROM table_57213 WHERE "Runner-Up" = 'elon'
SELECT "Champion" FROM "table_57213" WHERE "Runner-Up" = 'elon'