With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Sopranos has six episodes.
text_B: Arthur Thomas Brown -LRB- April 20 , 1900 -- October 24 , 1993 -RRB- was an American architect who is remembered as `` Tucson 's pioneer of solar design . ''
not_related.