With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Pablo Fenjves ghostwrote for Bernie Mac.
text_B: Juan Manuel Marquez vs. Juan Diaz was a boxing lightweight title superfight , for the vacant WBO / WBA lightweight championship , and Marquez 's The Ring lightweight title .. WBO. World Boxing Organization. WBA. World Boxing Association. The Ring. Ring Magazine. Juan Diaz. Juan Diaz ( boxer ). Juan Manuel Marquez. Juan Manuel Marquez. boxing. boxing. lightweight. lightweight. The bout was held on February 28 , 2009 , at the Toyota Center in Houston , Texas , United States .. Toyota Center. Toyota Center ( Houston ). Houston. Houston. Texas. Texas. Marquez won the fight via technical knockout in the ninth round .. The match was named the 2009 Fight of the Year .. 2009 Fight of the Year. Ring Magazine fights of the year
not_related.