Two modern buildings made of glass and stone accent the setting.
Some other buildings are made of concrete.
All that is known is that two building are made of glass and stone. One cannot assume there are some other buildings made of concrete.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & of(e1,x3) & n_setting(x7) & (x3 = x7) & n_accent(x5) & of(x5,x6) & n_stone(x6) & n_glass(x4) & subset_of(x5,x3) & subset_of(x4,x3) & Theme(e1,x2) & v_make(e1) & (x1 = x2) & n_building(x1) & a_modern(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_building(x2) & of(e1,x3) & n_concrete(x3) & Theme(e1,x1) & v_make(e1) & -(x1 = x2) & n_building(x1))