A child on a fake horse ride.
A child smiles while having a fun time on a horse ride.
Fake horse rides aren't always fun; one may not be all smiles and fun.
exists s1 x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_ride(x2) & of(x2,x3) & n_horse(x3) & a_fake(s1) & Theme(s1,x2) & n_child(x1))
exists e1 e2 x1 x2 x3 x4 x5.(while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_have(e2) & on(x2,x4) & n_ride(x4) & of(x4,x5) & n_horse(x5) & n_time(x2) & of(x2,x3) & n_fun(x3) & Actor(e1,x1) & v_smile(e1) & n_child(x1))