A man walking next to an orange van.
There is a lady walking next to a red car.
There can either be a man walking or a lady walking.
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 s1 x2 x3 x4.((x1 = x2) & to(e1,x4) & n_car(x4) & a_red(s1) & Theme(s1,x4) & r_next(e1) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_lady(x2))