A man on an empty sidewalk near a structure with a backwards EC.
A man is taking a cab home from work.
One can not be taking a cab and on an empty sidewalk simultaneously.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & with(x2,x4) & ne_org_ec(x4) & a_backwards(s2) & Theme(s2,x4) & near(x2,x3) & n_structure(x3) & n_sidewalk(x2) & a_empty(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & from(x2,x4) & n_work(x4) & n_home(x2) & of(x2,x3) & n_cab(x3) & n_man(x1))