An old man drives a go-cart with a little boy.
A father and young son at a local Go-Kart track.
An old man does not have to be a father.  A little boy does not have to be a young son.
exists e1 s1 s2 x1 x2 x3.(with(e1,x3) & n_boy(x3) & a_little(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_go-cart(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists s1 s2 s3 s4 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & at(x2,x3) & n_track(x3) & a_go-kart(s4) & Theme(s4,x3) & a_local(s3) & Theme(s3,x3) & n_son(x2) & a_young(s2) & Theme(s2,x2) & subset_of(x1,s1) & n_father(x1))