With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: New York's most populous county is New York City.
text_B: The Oakley THUMP are sunglasses that contain an MP3 player , in a 256 MB , 512 MB or 1 GB version .. Oakley. Oakley, Inc.. MP3 player. MP3 player. They were introduced in 2004 .. Prices for the THUMP PRO , introduced in Nov. 2007 range from $ 249 to $ 349 .
not_related.