CREATE TABLE table_73440 ("Conference" CLOB, "Regular Season Winner" CLOB, "Conference Player of the Year" CLOB, "Conference Tournament" CLOB, "Tournament Venue  ( City ) " CLOB, "Tournament Winner" CLOB)

Who won the regular season when Missouri Valley Conference took place?
SELECT "Regular Season Winner" FROM table_73440 WHERE "Conference" = 'Missouri Valley Conference'
SELECT "Regular Season Winner" FROM "table_73440" WHERE "Conference" = 'Missouri Valley Conference'