Two men wearing hats and ponchos ride horseback after a bull.
Two men chase down their escaped bull on horseback
The pair of Cowboys were trying to chase  their property which was the Escaped bull. I concluded since they are chasing the escaped byll it must be of some value to the pair.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(after(e2,x7) & n_bull(x7) & Theme(e2,x6) & Actor(e2,x1) & v_ride(e2) & n_horseback(x6) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & subset_of(x5,x3) & n_poncho(x5) & subset_of(x4,x3) & n_hat(x4) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 e2 s1 x1 x2 x3.(a_down(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_chase(e2) & on(x2,x3) & n_horseback(x3) & n_bull(x2) & Theme(e1,x2) & v_escape(e1) & of(x2,x1) & n_thing(x1) & n_man(x1) & card_eq_2(x1))