A car and a minivan have collided.
A car has hit a van.
It cannot be inferred from the information that the car has hit a van; the van may very well have hit the car.
exists e1 x1 x2 x3.(Actor(e1,x1) & v_collide(e1) & subset_of(x3,x1) & n_minivan(x3) & subset_of(x2,x1) & n_car(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hit(e1) & n_van(x2) & n_car(x1))