A man rides a horse in a parade.
Someone is in a parade.
A man is someone.
exists e1 x1 x2 x3.(in(e1,x3) & n_parade(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2) & n_man(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_parade(x2)) & n_person(x1))