This woman is horseback riding on a sunny afternoon.
A women rides a horse outside while naked.
A woman riding a horse does not infer that she is riding naked.
exists p1 x1.(n_woman(x1) & exists s1 s2 x2 x3.((x1 = x2) & on(x2,x3) & n_afternoon(x3) & a_sunny(s2) & Theme(s2,x3) & n_riding(x2) & a_horseback(s1) & Theme(s1,x2)))
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & Theme(s1,x4) & a_naked(s1) & (x2 = x4) & outside(x2,x3) & n_while(x3) & n_horse(x2) & n_woman(x1))