With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Batman: The Killing Joke was written by a Mongolian writer.
text_B: The National Democratic Party , laterly renamed National Radical Party was a political party in Greece in the 1920s led by Georgios Kondylis .. Georgios Kondylis. Georgios Kondylis. Greece. Greece
not_related.