Cowboy turns back to wave out of the corral at a rodeo.
A layman is riding his donkey at a rodeo
The subject cannot be a professional cowboy and a layman at the same time.
exists e1 p1 x1 x2 x3.(n_corral(x2) & ne_nam_cowboy(x1) & of(e1,x2) & at(x2,x3) & n_rodeo(x3) & r_out(e1) & exists s1 x4.(to(s1,x4) & n_wave(x4) & Theme(s1,x1) & a_back(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_turn(e1))
exists e1 x1 x2 x3.(at(e1,x3) & n_rodeo(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_donkey(x2) & of(x2,x1) & n_male(x1) & n_layman(x1))