A woman wearing a backpack standing on a street.
A woman is wearing a backpack waiting for a bus on the street.
A woman standing on a street is not necessarily waiting for a bus.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & on(x3,x5) & n_street(x5) & n_standing(x3) & of(x3,x4) & n_backpack(x4) & (x1 = x2) & n_woman(x1))
exists e1 e2 x1 x2 x3 x4.(n_street(x4) & for(e1,e2) & for(e2,x3) & on(x3,x4) & n_bus(x3) & Actor(e2,x1) & v_wait(e2) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_backpack(x2) & n_woman(x1))