A girl is walking by a window with a purse.
A girl has a purse and is walking to meet a friend for lunch.
The fact a girl is walking by a window with a purse doesn't imply that she is walking to meet a friend for lunch.
exists e1 x1 x2 x3.(by(e1,x2) & with(x2,x3) & n_purse(x3) & n_window(x2) & Actor(e1,x1) & v_walk(e1) & n_girl(x1))
exists e1 e2 p1 x1 x2 x3.(Topic(e2,p1) & Actor(e2,x3) & v_walk(e2) & exists e3 x4 x5.(for(e3,x5) & n_lunch(x5) & Theme(e3,x4) & Actor(e3,x3) & v_meet(e3) & n_friend(x4)) & n_girl(x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_purse(x2) & n_girl(x1))