A girl with sunglasses is standing by an airplane.
a girl waiting to go on her first plane trip
Standing by an airplane doesn't imply waiting to be on one and an airplane doesn't imply it is her first plane trip.
exists e1 x1 x2 x3.(by(e1,x3) & n_airplane(x3) & Actor(e1,x1) & v_stand(e1) & with(x1,x2) & n_sunglass(x2) & n_girl(x1))
exists e1 p1 s1 x1 x2 x3 x4.(a_topic(x1) & Topic(e1,p1) & Actor(e1,x2) & v_wait(e1) & exists e2.(on(e2,x3) & Actor(e2,x2) & v_go(e2)) & n_trip(x3) & of(x3,x4) & n_plane(x4) & a_first(s1) & Theme(s1,x3) & of(x3,x1) & n_female(x1) & (x1 = x2) & n_girl(x1))