A policeman rides his motorcycle while a truck displaying a very provocative ad is in front of him to the left.
The ad was boring and dull.
Boring and dull are opposites. The ad wouldn't be provocative while also being boring and dull.
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 s1 s2 x1.(n_ad(x1) & Theme(s2,x1) & a_dull(s2) & Theme(s1,x1) & a_boring(s1))