The child is playing hide and seek in the hay.
the kid is playing in the haystack before school
Now it's understood that he was hiding in a haystack, not just loose hay.
exists e4 e2 e3 e1 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 x3.(n_haystack(x2) & n_kid(x1) & before(e1,x3) & n_school(x3) & in(e1,x2) & Actor(e1,x1) & v_play(e1))