A girl with a backpack runs down the street.
A girl chases after her school friends.
The fact that a girl runs down the street doesn't imply that she chases after her school friends.
exists e1 x1 x2 x3.(n_street(x3) & down(e1,x3) & Actor(e1,x1) & v_run(e1) & with(x1,x2) & n_backpack(x2) & n_girl(x1))
exists x1 x2 x3 x4.(a_topic(x1) & after(x1,x3) & n_friend(x3) & of(x3,x4) & n_school(x4) & of(x3,x1) & n_female(x1) & n_chase(x1) & of(x1,x2) & n_girl(x2))