A homeless man sitting on a sofa under an overpass.
A homeless man is walking down the highway.
a man can't be sitting down and walking at the same time.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & under(e1,x4) & n_overpass(x4) & on(e1,x3) & n_sofa(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & a_homeless(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2.(n_highway(x2) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1) & a_homeless(s1) & Theme(s1,x1))