Two children climb a very large metal play structure.
There are children playing.
Playing could mean to climb.
exists e1 e2 s1 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_play(e2) & n_structure(x3) & n_metal(x2) & a_large(s1) & Theme(s1,x2) & r_very(x2) & Actor(e1,x1) & v_climb(e1) & n_child(x1) & card_eq_2(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_child(x2))