A man walking next to an orange van.
There is a boy walking next to an orange van.
Just because a man is walking next to an orange van doesn't mean there is a also a boy walking there.
exists e1 x1 x2 x3 x4.(a_topic(x1) & to(e1,x3) & n_van(x3) & of(x3,x4) & n_orange(x4) & r_next(e1) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_man(x1))
exists p1 x1 e1 x2 x3 x4 x5.((x1 = x2) & to(e1,x4) & n_van(x4) & of(x4,x5) & n_orange(x5) & r_next(e1) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_boy(x2))