Three kids on a scooter with three wheels.
The three kids are family.
A group of three kids is not automatically a family.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & with(x2,x3) & n_wheel(x3) & card_eq_3(x3) & n_scooter(x2) & n_kid(x1) & card_eq_3(x1))
exists p1 x1.(n_kid(x1) & card_eq_3(x1) & exists x2.((x1 = x2) & n_family(x2)))