A man walking with his child through a train station.
A father is looking for his lost child.
A man cannot simultaneously be walking with and looking for his child.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & through(e1,x4) & n_station(x4) & of(x4,x5) & n_train(x5) & with(e1,x3) & n_child(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_child(x2) & a_lost(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_look(e1) & n_father(x1))