The child is playing hide and seek in the hay.
The child is hiding in the hay.
Now it's understood that the child is doing the hiding portion only, of the game, hide and seek.
exists e4 e1 e3 e2 x1 x2 x3 x4 x5 x6 x7.(n_hay(x7) & n_child(x4) & n_child(x1) & in(e4,x7) & Theme(e4,x6) & Actor(e4,x4) & v_seek(e4) & n_thing(x6) & Actor(e3,x5) & v_play(e3) & (x4 = x5) & Theme(e2,x3) & Actor(e2,x1) & v_hide(e2) & n_thing(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2))
exists e1 x1 x2.(n_hay(x2) & n_child(x1) & in(e1,x2) & Actor(e1,x1) & v_hide(e1))