A woman on a horse wrangling a cow in a pen.
A man competes in a bull-riding competition.
The person is either a man or a woman.  The person can't be horse wrangling a cow in a pen and be in a bull-riding competition at the same time.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x2) & in(e1,x5) & n_pen(x5) & Theme(e1,x4) & Actor(e1,x3) & v_wrangle(e1) & n_cow(x4) & (x2 = x3) & n_horse(x2) & n_woman(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_competition(x2) & a_bull-riding(s1) & Theme(s1,x2) & Actor(e1,x1) & v_compete(e1) & n_man(x1))