CREATE TABLE table_204_351 (id DECIMAL, "week of" TEXT, "tournament" TEXT, "champions" TEXT, "runners-up" TEXT, "semifinalists" TEXT, "quarterfinalists" TEXT)

what is the first week of the tournament ?
SELECT "week of" FROM table_204_351 ORDER BY "week of" LIMIT 1
SELECT "week of" FROM "table_204_351" ORDER BY "week of" NULLS FIRST LIMIT 1