A man putting shingles on a roof.
A man is changing the light bulb
The man is either putting shingles on a roof or changing a light bulb.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_roof(x4) & Theme(e1,x3) & Actor(e1,x2) & v_put(e1) & n_shingle(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_bulb(x2) & of(x2,x3) & n_light(x3) & Theme(e1,x2) & Actor(e1,x1) & v_change(e1) & n_man(x1))