CREATE TABLE table_72974 ("Segment description" TEXT, "Date opened" TEXT, "Line ( s ) " TEXT, "Endpoints" TEXT, "# of new stations" TEXT, "Length  ( miles ) " TEXT)

What date of segment description red line mos-2 north open?
SELECT "Date opened" FROM table_72974 WHERE "Segment description" = 'Red Line MOS-2 North'
SELECT "Date opened" FROM "table_72974" WHERE "Segment description" = 'Red Line MOS-2 North'