With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sherlock is an American TV series.
text_B: Presidential elections were held in Cameroon on 11 October 2004 .. Cameroon. Cameroon. Incumbent President Paul Biya was easily re-elected in an election which the opposition claimed had seen widespread electoral fraud .. Paul Biya. Paul Biya. President. List of heads of state of Cameroon. electoral fraud. electoral fraud
not_related.