A group of motorcyclist are ridding through the streets.
A street with motorcyclists driving down it.
Motorcyclists are driving is rephrased as motorcyclists ridding through.
exists e1 x1 x2 x3.(n_street(x3) & through(e1,x3) & Actor(e1,x1) & v_rid(e1) & of(x1,x2) & n_motorcyclist(x2) & n_group(x1))
exists e1 x1 x2 x3.(a_topic(x1) & with(x1,x2) & down(e1,x1) & n_thing(x1) & Actor(e1,x3) & v_drive(e1) & (x2 = x3) & n_motorcyclist(x2) & n_street(x1))