two metal cages, one containing two rabbits, the other containing cardboard boxes.
The cages are not empty.
since two cages mentioned in first sentence contain two rabbits in one and cardboard boxes in other, it implies both cages are not empty.
exists e2 e3 e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(-(x6 = x6) & n_box(x6) & of(x6,x8) & n_cardboard(x8) & Actor(e3,x6) & v_contain(e3) & of(x6,x7) & n_cardboard(x7) & Actor(e2,x6) & v_contain(e2) & a_topic(s1) & subset_of(x6,s1) & subset_of(x1,s1) & rel(x1,x3) & Theme(e1,x5) & Actor(e1,x4) & v_contain(e1) & n_rabbit(x5) & card_eq_2(x5) & (x3 = x4) & n_thing(x3) & card_eq_1(x3) & n_cage(x1) & of(x1,x2) & n_metal(x2) & card_eq_2(x1))
exists x1.(n_cage(x1) & -exists s1.(Theme(s1,x1) & a_empty(s1)))