A boy stands beside a railing at a go kart track.
a girl and mother stand by a car
It cannot both be a boy on his own and a girl with her mother.
exists e1 x1 x2 x3 x4 x5.(at(e1,x3) & n_track(x3) & of(x3,x5) & n_kart(x5) & of(x3,x4) & n_go(x4) & beside(e1,x2) & n_railing(x2) & Actor(e1,x1) & v_stand(e1) & n_boy(x1))
exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & by(x2,x4) & n_car(x4) & n_stand(x2) & of(x2,x3) & n_mother(x3) & subset_of(x1,s1) & n_girl(x1))