A man in a costume entertains four kids.
A person is entertaining some children.
Children  and  four kids are different way to say the same thing.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_entertain(e1) & n_kid(x3) & card_eq_4(x3) & in(x1,x2) & n_costume(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_entertain(e1) & n_child(x2) & n_person(x1))