Some people are eating at tables at an event.
People are eating pizza at a table.
The people can eat anything from the table even there is no pizza.
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 x3.(at(e1,x3) & n_table(x3) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_pizza(x2) & n_people(x1))