Two men are riding on horses through the street.
Two men running a race.
One can not be running and riding simultaneously.
exists e1 x1 x2 x3.(n_street(x3) & through(e1,x3) & on(e1,x2) & n_horse(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_run(e1) & n_race(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))