A child is pushing a tire.
A child pushes a tire.
child is pushing a tire is just the same as child pushes a tire.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_tire(x2) & n_child(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_tire(x2) & n_child(x1))