a child and a young adult the adult is maybe demonstrating how to do something to teach the young child
The child and adult are son and father.
Just because the child and young adult are together does not mean they are father and son.
exists p1 s1 s2 s4 x1 x2.(a_topic(s1) & subset_of(x2,s1) & exists e1 s3 x3.(a_maybe(s3) & Manner(e1,s3) & Topic(e1,x3) & Actor(e1,x2) & v_demonstrate(e1) & n_manner(x3) & exists e2 p2 x4 x5 x6.(Topic(e2,p2) & exists e3.(Theme(e3,x1) & Actor(e3,x4) & v_teach(e3)) & Theme(e2,x6) & Actor(e2,x5) & v_do(e2) & n_thing(x6))) & n_child(x1) & n_child(x1) & a_young(s4) & Theme(s4,x1) & n_adult(x2) & n_adult(x2) & that(x2,p1) & a_young(s2) & Theme(s2,x2) & subset_of(x1,s1))
exists p1 x1 x2 x3.(n_adult(x3) & n_child(x2) & subset_of(x3,x1) & subset_of(x2,x1) & exists x4 x5 x6.((x1 = x4) & subset_of(x6,x4) & n_father(x6) & subset_of(x5,x4) & n_son(x5)))