A man and a woman stopped on the sidewalk looking at something with their eyes big and wide.
A man and a woman witness an accident.
Just because they stopped to look at something, doesn't mean they witnessed an accident.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_eye(x6) & of(x6,x4) & n_thing(x4) & n_sidewalk(x4) & for(e1,e2) & at(e2,x5) & Theme(s2,x8) & a_wide(s2) & (x5 = x8) & Theme(s1,x7) & a_big(s1) & (x5 = x7) & with(x5,x6) & n_thing(x5) & Actor(e2,x1) & v_look(e2) & on(e1,x4) & Actor(e1,x1) & v_stop(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists s1 x1.(a_topic(s1) & all x2.(n_accident(x2) -> exists x3 x4.(subset_of(x3,s1) & for(x3,x2) & n_witness(x3) & of(x3,x4) & n_woman(x4))) & subset_of(x1,s1) & n_man(x1))