CREATE TABLE table_64114 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" FLOAT)

What is the week with w 31-21 result?
SELECT "Week" FROM table_64114 WHERE "Result" = 'w 31-21'
SELECT "Week" FROM "table_64114" WHERE "Result" = 'w 31-21'