A girl with a backpack runs down the street.
A girl with a backpack is running to catch the bus.
The fact that a girl runs down the street doesn't imply that she is running to catch the bus.
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 e1 p1 x1 x2 x3 x4 x5.(n_bus(x5) & Topic(e1,p1) & exists e2.(Theme(e2,x5) & Actor(e2,x1) & v_catch(e2)) & Actor(e1,x3) & v_run(e1) & with(x3,x4) & n_backpack(x4) & n_girl(x3) & with(x1,x2) & n_backpack(x2) & n_girl(x1))