This family is having dinner.
They are at a table.
JUST BECAUSE THE FAMILY IS AT A TABLE DOES NOT MEAN THEY ARE HAVING DINNER.
exists e1 x1 x2.(n_family(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_dinner(x2))
exists p1 x1.(n_thing(x1) & exists x2.(at(x1,x2) & n_table(x2)))