A man putting shingles on a roof.
A man is repairing his roof.
A man putting shingles on a roof does not necessarily indicate the roof he is putting shingles on is his roof, or that he is repairing it.
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.(Theme(e1,x2) & Actor(e1,x1) & v_repair(e1) & n_roof(x2) & of(x2,x1) & n_male(x1) & n_man(x1))