A man with a jackhammer demolishing cement
A man is riding a tractor.
Demolishing cement is not riding a tractor.
exists x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & n_cement(x2) & of(x2,x4) & n_demolishing(x4) & of(x2,x3) & n_jackhammer(x3) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_tractor(x2) & n_man(x1))