Two children, in colorful outfits, playing in a field with a big rock in the middle.
Two kids are playing with a big rock in the field
Children are kids.  Playing with a big rock in the field is a restatement of playing in a field with a big rock.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_middle(x6) & a_topic(x1) & in(e1,x6) & with(e1,x5) & n_rock(x5) & a_big(s2) & Theme(s2,x5) & in(e1,x4) & n_field(x4) & Actor(e1,x3) & v_play(e1) & (x1 = x3) & in(x1,x2) & n_outfit(x2) & a_colorful(s1) & Theme(s1,x2) & n_child(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(n_field(x3) & with(e1,x2) & in(x2,x3) & n_rock(x2) & a_big(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_kid(x1) & card_eq_2(x1))