With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gennady Golovkin is ranked worst middleweight by the Transnational Boxing Rankings Board.
text_B: Gennady Gennadyevich Golovkin -LRB- Геннадии Геннадьевич Головкин born 8 April 1982 -RRB- is a Kazakhstani professional boxer who currently holds the unified WBA -LRB- Super -RRB- , WBC , IBF , and IBO middleweight titles .. professional boxer. professional boxer. WBC. World Boxing Council. IBF. International Boxing Federation. IBO. International Boxing Organization. middleweight. middleweight. As of May 2017 , he is ranked as the world 's best middleweight by BoxRec and the Transnational Boxing Rankings Board , and second best by The Ring .. middleweight. middleweight. BoxRec. BoxRec. Transnational Boxing Rankings Board. Transnational Boxing Rankings Board. The Ring. The Ring magazine Pound for Pound. He is also ranked as the world 's third best boxer , pound for pound , by The Ring , fifth by BoxRec , and seventh by the Transnational Boxing Rankings Board .. BoxRec. BoxRec. Transnational Boxing Rankings Board. Transnational Boxing Rankings Board. The Ring. The Ring magazine Pound for Pound. pound for pound. pound for pound. Golovkin won his first major world championship , the WBA interim middleweight title , by defeating Milton Nunez in 2010 .. middleweight. middleweight. interim. interim championship. Milton Nunez. Milton Nunez ( boxer ). He was elevated to WBA -LRB- Regular -RRB- champion in the same year , and in 2011 would win the vacant IBO middleweight title by defeating Lajuan Simon .. IBO. International Boxing Organization. middleweight. middleweight. Lajuan Simon. Lajuan Simon. In 2014 , Golovkin was elevated to his current status of WBA -LRB- Super -RRB- champion and successfully defended both his titles against Daniel Geale .. Daniel Geale. Daniel Geale. Later that year he defeated Marco Antonio Rubio to add the WBC interim middleweight title to his collection , and defeated David Lemieux in 2015 to win the IBF middleweight title .. WBC. World Boxing Council. IBF. International Boxing Federation. middleweight. middleweight. interim. interim championship. Marco Antonio Rubio. Marco Antonio Rubio. David Lemieux. David Lemieux ( boxer ). After Canelo Alvarez vacated his WBC middleweight title in 2016 , Golovkin was elevated to full champion and now holds world titles by three of the four major boxing sanctioning bodies .. WBC. World Boxing Council. middleweight. middleweight. Canelo Alvarez. Canelo Alvarez. A calculating pressure fighter , Golovkin is known for his powerful and precise punching , balance , and methodical movement .. pressure fighter. pressure fighter. With a streak of 23 knockouts that spanned from 22 November 2008 to 18 March 2017 , he holds the highest knockout percentage -- 89.8 % -- in middleweight championship history .. middleweight. middleweight. knockout. knockout. In 2016 , he achieved his 17th title defense by knockout , which equalled the record set by Wilfredo Gomez in 1982 .. knockout. knockout. Wilfredo Gomez. Wilfredo Gomez. Golovkin is also said to have one of the best chins in modern boxing , having never been knocked down or knocked out in a total of 387 fights , neither as a professional nor amateur .. chins. chin ( boxing ). knocked down. Knockdown ( boxing ). amateur. amateur boxing. In his amateur career , Golovkin won a gold medal in the middleweight division at the 2003 World Championships .. World Championships. World Amateur Boxing Championships. middleweight. middleweight. amateur. amateur boxing. 2003 World Championships. 2003 World Amateur Boxing Championships. He went on to represent Kazakhstan at the 2004 Summer Olympics , winning a middleweight silver medal .. Kazakhstan. Kazakhstan. middleweight. middleweight. Kazakhstan at the 2004 Summer Olympics. Kazakhstan at the 2004 Summer Olympics
related.