A boy is covered with marker.
The boy has a marker.
That the boy is covered with marker doesn't mean he has the marker.
exists e1 x1 x2.(with(e1,x2) & n_marker(x2) & Theme(e1,x1) & v_cover(e1) & n_boy(x1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_marker(x2))