With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Czech Republic has 10.5 million residents.
text_B: `` The Pursuit '' , the first single off Evans Blue 's second album , The Pursuit Begins When This Portrayal of Life Ends , hit airwaves May 21 , 2007 and was accompanied by a music video , directed by Jesse Ewles .. Evans Blue. Evans Blue. The Pursuit Begins When This Portrayal of Life Ends. The Pursuit Begins When This Portrayal of Life Ends. The song peaked at # 32 on US Modern Rock and # 17 on US Mainstream Rock .. US Modern Rock. US Modern Rock. US Mainstream Rock. US Mainstream Rock. It was released on iTunes on July 10 , 2007 .
not_related.