Little girl and boy playing in the park, with their dog.
The boy and girl are eating lunch.
One cannot be playing and eating lunch simultaneously.
exists s1 x1 x2 x3 x4 x5.(n_dog(x5) & of(x5,x4) & n_thing(x4) & n_park(x4) & a_topic(x1) & in(x1,x4) & with(x4,x5) & n_playing(x1) & of(x1,x3) & n_boy(x3) & of(x1,x2) & n_girl(x2) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(n_girl(x3) & n_boy(x2) & subset_of(x3,x1) & subset_of(x2,x1) & Theme(e1,x4) & Actor(e1,x1) & v_eat(e1) & n_lunch(x4))