A man is riding a bucking horse trying to hold on and not get thrown off.
A man in a rodeo.
The man might riding in a corral or on the open range, and doesn't have to be in a rodeo.
exists e2 e1 p1 x1 x2 x3.(for(e1,e2) & Topic(e2,p1) & Actor(e2,x1) & v_try(e2) & exists e3 s1.(-exists e4 p2.(exists e5 s2.(a_off(s2) & Manner(e5,s2) & Theme(e5,x1) & v_throw(e5)) & Topic(e4,p2) & Actor(e4,x1) & v_get(e4)) & a_on(s1) & Manner(e3,s1) & Actor(e3,x1) & v_hold(e3)) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2) & of(x2,x3) & n_bucking(x3) & n_man(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_rodeo(x2) & n_man(x1))