A young fair-skinned boy rides a play horse at a playground.
A grown man rides a horse down a beach.
We know nothing about the grown man who rides a horse down the beach.   We only know about a boy.
exists e1 s1 s2 x1 x2 x3 x4.(Recipient(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_play(x4) & at(x2,x3) & n_playground(x3) & n_horse(x2) & n_boy(x1) & a_fair-skinned(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3) & n_beach(x3) & n_horse(x2) & n_man(x1) & a_grown(s1) & Theme(s1,x1))