With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Penny Dreadful draws upon many public domain theses.
text_B: War on Whistleblowers  : Free Press and the National Security State is a 66-minute documentary by Robert Greenwald and Brave New Foundation , released in 2013 .. Robert Greenwald. Robert Greenwald
not_related.