Couples are dancing on the street
Couples are racing cars.
A couple can not be dancing on the street and racing cars at the same time.
exists e1 x1 x2.(n_street(x2) & on(e1,x2) & Actor(e1,x1) & v_dance(e1) & n_couple(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_race(e1) & n_car(x2) & n_couple(x1))