Three children on a swing set.
Three kids playing on a swing set.
Three children is three kids.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_set(x2) & of(x2,x3) & n_swing(x3) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_set(x3) & of(x3,x4) & n_swing(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_kid(x1) & card_eq_3(x1))