Young father playing with his kids.
Father playing with his mother.
Kids can not be their father's mother.
exists s1 x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_kid(x3) & of(x3,x1) & n_male(x1) & n_play(x1) & of(x1,x2) & n_father(x2) & a_young(s1) & Theme(s1,x1))
exists x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_mother(x3) & of(x3,x1) & n_male(x1) & n_playing(x1) & (x1 = x2) & ne_nam_father(x2))