Two couples dressed in yellow are dancing.
Two couples are eating pizza.
The people are either eating pizza or dancing, but not at the same time.
exists e1 e2 x1 x2 x3.(Actor(e2,x1) & v_dance(e2) & in(e1,x3) & n_yellow(x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_couple(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_pizza(x2) & n_couple(x1) & card_eq_2(x1))