A policeman rides his motorcycle while a truck displaying a very provocative ad is in front of him to the left.
There are vehicles.
A motorcycle and a truck are vehicles.
exists e1 p1 x1 x2 x7.(n_left(x7) & exists e2 p2 s1 x3 x4 x5.(exists x6.(in(x3,x6) & to(x6,x7) & of(x6,x1) & n_front(x6)) & Theme(e2,x5) & Actor(e2,x4) & v_display(e2) & n_ad(x5) & a_provocative(s1) & Theme(s1,x5) & r_very(x5) & (x3 = x4) & n_truck(x3)) & n_male(x1) & n_male(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & of(x2,x1) & n_policeman(x1))
exists p1 x1 x2.((x1 = x2) & n_vehicle(x2))