CREATE TABLE table_30980 ("Conference" TEXT, "Regular Season Winner" TEXT, "Conference Player of the Year" TEXT, "Conference Tournament" TEXT, "Tournament Venue  ( City ) " TEXT, "Tournament Winner" TEXT)

Who was the regular season winner of the 1999 Big Sky Men's Basketball Tournament was the conference tournament?
SELECT "Regular Season Winner" FROM table_30980 WHERE "Conference Tournament" = '1999 Big Sky Men''s Basketball Tournament'
SELECT "Regular Season Winner" FROM "table_30980" WHERE "Conference Tournament" = '1999 Big Sky Men\'s Basketball Tournament'