A man rides a horse down the street as a crowd watches.
A woman riding a pony.
The people must be different, as they must be a man and a woman, and riding a horse or a pony
exists e1 p1 x1 x2 x3.(n_street(x3) & exists e2 x4.(Actor(e2,x4) & v_watch(e2) & n_crowd(x4)) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3) & n_horse(x2) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_pony(x3) & (x1 = x2) & n_woman(x1))