Two baseball players collide.
Two baseball players hit each other while chasing a ball.
Players hit each other doesn't mean they collided.
exists x1 x2 x3.(a_topic(x1) & Time(x1,x3) & n_collide(x3) & n_player(x1) & of(x1,x2) & n_baseball(x2) & card_eq_2(x1))
exists x1 x2.(all x3.(n_other(x3) -> exists e2 e1 x4.(while(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_chase(e2) & n_ball(x4) & Theme(e1,x3) & Actor(e1,x1) & v_hit(e1))) & n_player(x1) & of(x1,x2) & n_baseball(x2) & card_eq_2(x1))