An adult man and young child are walking along the edge of a body of water.
The man and child are father/son, taking a walk at twilight.
Just because a man is walking next to a child does not mean they are father/son, and they could be walking at any time of day, not just twilight.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_edge(x5) & along(e1,x5) & of(x5,x6) & of(x6,x7) & n_water(x7) & n_body(x6) & Actor(e1,x1) & v_walk(e1) & n_child(x3) & a_young(s1) & Theme(s1,x3) & n_man(x2) & of(x2,x4) & n_adult(x4) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 p1 x1 x2 x3 x4 x5.(n_child(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & for(p1,e1) & at(e1,x5) & n_twilight(x5) & Theme(e1,x4) & Actor(e1,x1) & v_take(e1) & n_walk(x4) & exists x6.((x1 = x6) & n_father/son(x6)))