Children ride a balloon ride in an amusement park.
A group of brothers and sisters are riding on a balloon ride at the amusement park.
They are brothers and sisters.
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & in(x2,x4) & n_park(x4) & of(x4,x5) & n_amusement(x5) & n_ride(x2) & of(x2,x3) & n_balloon(x3) & n_child(x1))
exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(n_park(x7) & of(x7,x8) & n_amusement(x8) & at(e1,x7) & on(e1,x5) & n_ride(x5) & of(x5,x6) & n_balloon(x6) & Actor(e1,x1) & v_ride(e1) & of(x1,x2) & subset_of(x4,x2) & n_sister(x4) & subset_of(x3,x2) & n_brother(x3) & n_group(x1))