A man toy field hockey with a toddler in the grass.
A man playing field hockey with his son outside.
Just because he's playing with the toddler doesn't imply the toddler is his son.
exists x1 x2 x3 x4 x5 x6.(n_grass(x6) & a_topic(x1) & with(x1,x5) & in(x5,x6) & n_toddler(x5) & n_hockey(x1) & of(x1,x4) & n_field(x4) & of(x1,x3) & n_toy(x3) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Time(e1,x6) & n_outside(x6) & with(e1,x5) & n_son(x5) & of(x5,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_hockey(x3) & of(x3,x4) & n_field(x4) & (x1 = x2) & n_man(x1))