A girl with a backpack runs down the street.
The backpack is open.
We can not assume the backpack is open while the girl is running.
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 s1 x1.(n_backpack(x1) & Theme(s1,x1) & a_open(s1))