A flight attendant is demonstrating safety devices.
A flight attendant is putting on a show
Demonstrating devices means that one is putting on a kind of show.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_demonstrate(e1) & n_device(x3) & of(x3,x4) & n_safety(x4) & n_attendant(x1) & of(x1,x2) & n_flight(x2))
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_show(x4) & Theme(e1,x3) & Actor(e1,x1) & v_put(e1) & n_thing(x3) & n_attendant(x1) & of(x1,x2) & n_flight(x2))