An orchestra in a large room.
the orchestra is not playing
One cannot infer that the orchestra is not playing given the information.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_room(x2) & a_large(s1) & Theme(s1,x2) & n_orchestra(x1))
exists x1.(n_orchestra(x1) & -exists e1.(Actor(e1,x1) & v_play(e1)))