sentences:  The Niners then took a 10–0 lead when Ralph McGill ran back a 50-yard punt return.Gene Washington completed a 38-yard pass from quarterback Jim Plunkett to give the 49ers a 17–0 lead in the first quarter.The Seahawks Hugh McKinnis had a one-yard rush into the 49ers' end zone to cut San Francisco's lead to 17–7 at the end of the quarter.