A bucking brown horse next to a falling cowboy.
A horse is nest to a cowboy.
The horse is bucking, which may be why the cowboy is falling next to the horse.
exists e2 e1 s1 x1 x2 x3.(a_topic(x1) & to(x2,x3) & n_cowboy(x3) & Actor(e2,x3) & v_fall(e2) & next(x1,x2) & n_thing(x2) & n_horse(x1) & a_brown(s1) & Theme(s1,x1) & Actor(e1,x1) & v_buck(e1))
exists p1 x1.(exists x2 x3.((x1 = x2) & to(x2,x3) & n_cowboy(x3) & n_nest(x2)) & n_horse(x1))