A man wearing dark clothing is talk to a young boy while they are walking down the sidewalk.
A man walks with his son down the sidewalk.
We can not assume this is the man's son.
exists e1 p1 p2 s1 x1 x2 x5.(n_sidewalk(x5) & exists e2.(down(e2,x5) & Actor(e2,x1) & v_walk(e2)) & n_thing(x1) & while(p1,p2) & exists s2 x3 x4.((x1 = x3) & to(x3,x4) & n_boy(x4) & a_young(s2) & Theme(s2,x4) & n_talk(x3)) & n_clothing(x1) & a_dark(s1) & Theme(s1,x1) & Actor(e1,x1) & v_wear(e1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(n_sidewalk(x3) & down(e1,x3) & with(e1,x2) & n_son(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_walk(e1) & n_man(x1))