A man is sitting in a running bathtub.
A man standing next to a running river.
A man can be standing or sitting, not both. A running bathtub is not the same as a running river.
exists e2 e1 x1 x2.(in(e1,x2) & n_bathtub(x2) & Actor(e2,x2) & v_run(e2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 e2 x1 x2 x3.(a_topic(x1) & to(e1,x3) & n_river(x3) & Actor(e2,x3) & v_run(e2) & r_next(e1) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1))