Man showering next to a window.
A man is cleaning a shower.
A man cannot be showering at the same time he is cleaning a shower.
exists e1 x1 x2 x3.(a_topic(x1) & to(e1,x3) & n_window(x3) & r_next(e1) & Actor(e1,x2) & v_shower(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & n_shower(x2) & n_man(x1))