A woman is ridding on a horse is beat a cow.
A woman passes a cow in a pasture while she rides her horse.
If a woman, riding a horse, beats a cow, that implies a race and not that she just passes a cow.
exists e2 e1 x1 x2 x3 x4.(Recipient(e2,x4) & Theme(e2,x1) & v_beat(e2) & n_cow(x4) & on(e1,x3) & n_horse(x3) & Actor(e1,x2) & v_rid(e1) & (x1 = x2) & n_woman(x1))
exists e1 p1 x1 x2 x3 x4.(exists e2 x1.(Theme(e2,x4) & Actor(e2,x1) & v_ride(e2) & n_female(x1)) & n_horse(x4) & of(x4,x1) & n_female(x1) & while(e1,p1) & in(e1,x3) & n_pasture(x3) & Theme(e1,x2) & Actor(e1,x1) & v_pass(e1) & n_cow(x2) & n_woman(x1))