A man paints a picture of a dog.
There is a man painting
A person could be painting a picture of a dog.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & of(x2,x3) & n_dog(x3) & n_picture(x2) & n_man(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_painting(x2) & of(x2,x3) & n_man(x3))