The man in the blue shirt is working on the light.
A man hangs a painting.
You can't  be working on the light and hanging a painting.
exists e1 s1 x1 x2 x3.(n_light(x3) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1) & on(e1,x3) & Actor(e1,x1) & v_work(e1) & in(x1,x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hang(e1) & n_painting(x2) & n_man(x1))