A man in a white shirt walking in front of an old building.
a guy is eating a sandwich inside
One cannot be walking in front of an old building and eating a sandwich inside at the same time.
exists s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & in(x2,x4) & of(x4,x5) & n_building(x5) & a_old(s2) & Theme(s2,x5) & n_front(x4) & n_walking(x2) & of(x2,x3) & n_shirt(x3) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_inside(x2) & of(x2,x3) & n_sandwich(x3) & n_guy(x1))