Table:
text: 1967 Belgian Grand Prix
Classification
Classification
Driver Constructor_ Laps Time_Retired Grid
Dan Gurney Eagle - Weslake 28 1:40:49.4 2
Jackie Stewart BRM 28 + 1:03.0 6
Chris Amon Ferrari 28 + 1:40.0 5
Jochen Rindt Cooper - Maserati 28 + 2:13.9 4
Mike Spence BRM 27 + 1 Lap 11
Jim Clark Lotus - Ford 27 + 1 Lap 1
Jo Siffert Cooper - Maserati 27 + 1 Lap 16
Bob Anderson Brabham - Climax 26 + 2 Laps 17
Pedro Rodríguez Cooper - Maserati 25 Engine 13
Guy Ligier Cooper - Maserati 25 + 3 Laps 18
Ludovico Scarfiotti Ferrari 24 Not Classified 9

Question: What is the average laps for Jackie Stewart in the 1967 Belgian Grand Prix?