A line of children are walking through a park.
Children are running through the park.
Walking is not the same as running.
exists e1 x1 x2 x3.(through(e1,x3) & n_park(x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_child(x2) & n_line(x1))
exists e1 x1 x2.(n_park(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_child(x1))