Cowboy being thrown off bucking horse.
There is a man an a horse.
There is a man an a horse implies a cowboy
exists e1 e2 s1 x1 x2.(ne_nam_cowboy(x1) & for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_buck(e2) & n_horse(x2) & a_off(s1) & Manner(e1,s1) & Theme(e1,x1) & v_throw(e1))
exists p1 x1.all x2.(n_horse(x2) -> exists x3.((x1 = x3) & for(x3,x2) & n_man(x3)))