With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Quincy Center is the only area to ever exist in Boston.
text_B: Yuri Dmitrievich Petukhov -LRB- May 17 , 1951 -- February 1 , 2009 -RRB- Russian sci-fi writer , philosopher , publisher , non-academic explorer in world history and philology .. Russian. Russians. world history. pseudohistory. philology. philology
not_related.