With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Azerbaijan is the third most irreligious country in the Muslim world.
text_B: The 1913 Indianapolis 500-Mile Race , or International 500-Mile Sweepstakes Race , the third such race in history , was held at the Indianapolis Motor Speedway on Friday , May 30 , 1913 .. Indianapolis Motor Speedway. Indianapolis Motor Speedway
not_related.