If one crosses the street one can get hit by a bus. Its a central flow.
If one flies with a plane the plane can crash. Its a central flow.
He is probably not flying with a plane, driving with a car or crossing streets.
If one crosses the street one can get hit by a bus. Its a central flow.
If one flies with a plane the plane can crash. Its a central flow.
He is probably not flying with a plane, driving with a car or crossing streets.
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