Some people are eating at tables at an event.
People are dancing on the table.
If they are eating at tables, they are not dancing on the table.
exists e1 x1 x2 x3.(at(e1,x3) & n_event(x3) & at(e1,x2) & n_table(x2) & Actor(e1,x1) & v_eat(e1) & n_people(x1))
exists e1 x1 x2.(n_table(x2) & on(e1,x2) & Actor(e1,x1) & v_dance(e1) & n_people(x1))