Horse and rider galloping across a green field.
A man is riding a zebra.
A horse is not the same as a zebra.
exists s1 s2 x1 x2 x3 x4.(ne_nam_horse(x1) & a_topic(s1) & subset_of(x2,s1) & across(x2,x4) & n_field(x4) & a_green(s2) & Theme(s2,x4) & n_galloping(x2) & of(x2,x3) & n_rider(x3) & subset_of(x1,s1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_zebra(x2) & n_man(x1))