A motorcycle races along a deserted road where there are trees in the background.
A motorcycle races down the road evading police behind him.
Sentence 2 tells us why the motorcycle is racing along the road as he is evading the police who are behind him.
exists p1 s1 x1 x2 x3 x6.(n_background(x6) & a_topic(x1) & along(x1,x3) & exists p2 x4 x5.((x4 = x5) & in(x5,x6) & n_tree(x5)) & where(x3,p1) & n_road(x3) & a_deserted(s1) & Theme(s1,x3) & n_race(x1) & of(x1,x2) & n_motorcycle(x2))
exists e1 x1 x2 x3 x4.(n_male(x4) & n_police(x3) & Actor(e1,x3) & v_evade(e1) & of(x3,x4) & n_road(x4) & a_topic(x1) & down(x1,x3) & behind(x3,x4) & n_race(x1) & of(x1,x2) & n_motorcycle(x2))