A car and a minivan have collided.
A car wreck.
a can is said to be  wreck only when it is  collided
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 x1 x2.(a_topic(x1) & n_wreck(x1) & of(x1,x2) & n_car(x2))