With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Conor McGregor started his boxing career in 2008.
text_B: Buses is a United Kingdom magazine , focusing mainly on the British public bus industry .. United Kingdom. United Kingdom. bus. bus. It was originally published by Ian Allan Publishing , and from March 2012 it was published by Key Publishing .. Key Publishing. Key Publishing. Ian Allan Publishing. Ian Allan Publishing
not_related.