A man is on a roof doing construction.
The man is on the roof.
A man is on a roof doing construction, so it must follow that he is on the roof.
exists p1 x1.(exists e1 x2 x3 x4.(on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_construction(x4) & (x2 = x3) & n_roof(x2)) & n_man(x1))
exists p1 x1 x2.(n_roof(x2) & n_man(x1) & on(x1,x2))