A family is observing nine jet planes flying below the clear sky.
A family is watching the presentation taking place at a nearby airport.
Observing nine jet planes does not necessarily mean there is a presentation taking place.
exists e1 e2 s1 x1 x2 x3 x4 x5.(n_sky(x5) & a_clear(s1) & Theme(s1,x5) & Theme(e2,x2) & Actor(e2,x1) & v_observe(e2) & below(e1,x5) & Actor(e1,x4) & v_fly(e1) & (x2 = x4) & n_plane(x2) & of(x2,x3) & n_jet(x3) & card_eq_9(x2) & n_family(x1))
exists e1 e2 s1 x1 x2 x3 x4 x5.(n_presentation(x2) & Theme(e2,x2) & Actor(e2,x1) & v_watch(e2) & at(e1,x5) & n_airport(x5) & a_nearby(s1) & Theme(s1,x5) & Theme(e1,x4) & Actor(e1,x3) & v_take(e1) & n_place(x4) & (x2 = x3) & n_family(x1))