A couple eats ice cream in the park.
A couple is eating pizza.
you cannot eat ice cream and pizza at the same time
exists e1 x1 x2 x3 x4.(n_park(x4) & in(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_cream(x2) & of(x2,x3) & n_ice(x3) & n_couple(x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_pizza(x2) & a_eating(s1) & Theme(s1,x2)) & n_couple(x1))