Question: The North American Boxing Association (NABA) is a boxing governing body, affiliated with the World Boxing Association (WBA), recognizes how many weight classes?
Context: James Obede "Hot Ice" Toney ( (1980--) 05 1980 (age (2017)-(1980)-((11)<(08)or(11)==(08)and(30)<(05)) ) ) born in Accra is a Ghanaian professional middle/super middle/light heavy/cruiserweight boxer of the 2000s and 2010s who won the African Boxing Union (ABU) middleweight title, World Boxing Council (WBC) International middleweight title, and Commonwealth middleweight title, and was a challenger for the World Boxing Council (WBC) International middleweight title against Sergey Tatevosyan, and North American Boxing Federation (NABF) super middleweight title, North American Boxing Association (NABA) super middleweight title, and World Boxing Council (WBC) Continental Americas super middleweight title, against Lucian Bute, his professional fighting weight varied from 157 lb , i.e. middleweight to 185 lb , i.e. cruiserweight. Jeff "Flash" Malcolm (born 9 May 1956 in Cowra, New South Wales), is an Australian professional boxer who fought from 1971 until 2002.  He won the Australian light welterweight title, New South Wales (Australia) State lightweight title, Australasian light welterweight title, South Pacific light welterweight title, Queensland (Australia) State welterweight title, International Boxing Council (IBC) welterweight title, South Pacific welterweight title, World Boxing Federation (WBF) Intercontinental welterweight title, WBF welterweight title, Pan Asian Boxing Association (PABA) welterweight title, World Boxing Association (WBA) Fedelatin welterweight title, PABA light middleweight title, and Commonwealth light welterweight title.  He was also a challenger for the South Seas light welterweight title against Pat Leglise, Australian welterweight title against Wilf Gentzen, and World Boxing Organization (WBO) welterweight title against Manning Galloway.  His professional fighting weight varied from 135 lb , i.e. lightweight to 165+1/4 lb , i.e. super middleweight.  He was inducted into the Australian National Boxing Hall of Fame in 2007. Crawford "Chilling" Ashley (born Gary Crawford, 20 May 1964 in Leeds is an English professional super middle/light heavy/cruiser/heavyweight boxer of the 1980s, '90s and 2000s, who won the British Boxing Board of Control (BBBofC) Central Area light heavyweight title, BBBofC British light heavyweight title, European Boxing Union (EBU) light heavyweight title (twice), and Commonwealth light heavyweight title (twice), drew with Yawe Davis for the vacant European Boxing Union (EBU) light heavyweight title, and was a challenger for the European Boxing Union (EBU) light heavyweight title against Graciano Rocchigiani, World Boxing Association (WBA) World super middleweight title against Michael Nunn, World Boxing Association (WBA) World light heavyweight title against Virgil Hill, and World Boxing Union (WBU) cruiserweight title against Sebastiaan Rothmann, his professional fighting weight varied from 163 lb , i.e. super middleweight to 211 lb , i.e. heavyweight. The North American Boxing Association (NABA) is a boxing governing body which was established in 1997.  It is affiliated with the World Boxing Association (WBA) and recognizes champions in 17 weight classes. A weight class is a measurement weight range for boxers.  The lower limit of a weight class is equal to the upper weight limit of the class below it.  The top class, with no upper limit, is called heavyweight in professional boxing and super heavyweight in amateur boxing.  A boxing match is usually scheduled for a fixed weight class, and each boxer's weight must not exceed the upper limit.  Although professional boxers may fight above their weight class, an amateur boxer's weight must not fall below the lower limit.  A nonstandard weight limit is called a catch weight. Andrew "The Eagle" Murray (1 July 1971 — 26 January 2002 (aged 30)) born in Georgetown was a Guyanese professional welter/light middle/middleweight boxer of the 1990s and 2000s who won the World Boxing Council (WBC) FECARBOX welterweight title, World Boxing Association (WBA) Fedelatin welterweight title, and Commonwealth welterweight title, and was a challenger for the World Boxing Association (WBA) World welterweight title against Ike Quartey, World Boxing Union (WBU) welterweight title against Michele Piccirillo, and World Boxing Organization (WBO) North American Boxing Organization (NABO) light middleweight title against Fathi Missaoui, his professional fighting weight varied from 145 lb , i.e. welterweight to 156 lb , i.e. middleweight.  Andrew Murray was trained by Emanuel Steward, and was the Vice-President of the Guyana Amateur Boxing Board and was training several young boxers, and he had coached Hugo Lewis to the Guyanese super featherweight title on 26 December 2001.  Andrew Murray died in a traffic collision on the Soesdyke-Linden Highway early in the morning of Sunday 27 January 2002, he had been in Linden promoting a fight card and was on his way back to Georgetown. Justin "The Destroyer" Juuko (born 26 December 1972 in Masaka) is a Ugandan amateur light flyweight and professional feather/super feather/light/light welter/welterweight boxer of the 1990s, 2000s and 2010s who as an amateur won the gold medal at light flyweight in the Boxing at the 1990 Commonwealth Games in Auckland, New Zealand, and as a professional won the World Boxing Council (WBC) International super featherweight title, World Boxing Council (WBC) FECARBOX super featherweight title, African Boxing Union (ABU) light welterweight title, North American Boxing Federation (NABF) super featherweight title, and Commonwealth super featherweight title, and was a challenger for the interim World Boxing Association (WBA) World super featherweight title against Antonio Hernandez, World Boxing Council (WBC) super featherweight title against Floyd Mayweather, Jr., International Boxing Association (IBA) super featherweight title against Diego Corrales, World Boxing Union (WBU) super featherweight title against Michael Gomez, International Boxing Association (IBA) lightweight title against Rustam Nugaev, Global Boxing Union (GBU) light welterweight title against Gábor Vető, his professional fighting weight varied from 125 lb , i.e. featherweight to 143 lb , i.e. welterweight. Jermain "Choo Choo" Mackey ( (1979--) 27 1979 (age 37 ) ) born in Nassau is a Bahamian professional middle/super middle/light heavyweight boxer of the 2000s and 2010s who won the Bahamas super middleweight title, World Boxing Council (WBC) Caribbean Boxing Federation (CABOFE) super middleweight title, World Boxing Association (WBA) Fedecaribe super middleweight title, Commonwealth super middleweight title, and was a challenger for the World Boxing Organization (WBO) North American Boxing Organization (NABO) super middleweight title against Jean Pascal, WBC International super middleweight title against Adonis Stevenson, and World Boxing Association Fedelatin super middleweight title against Kirt Sinnette, his professional fighting weight varied from 160+3/4 lb , i.e. welterweight to 170 lb , i.e. light heavyweight.  He represented the Bahamas at the 2002 Commonwealth Games. Ralph Charles (born 5 February 1943) is an English amateur welterweight and professional light welter/welter/light middle/middleweight boxer of the 1960s and '70s who as an amateur won the Amateur Boxing Association of England (ABAE) 1959 Junior Class-A title against Kenneth "Ken"/"Kenny" J. Cooper  (Warley ABC), boxing out of West Ham Boys & ABC, won the Amateur Boxing Association of England (ABAE) 1960 Junior Class-B title against J. Harwood (National Association of Boys Clubs), boxing out of West Ham Boys & ABC, and was runner-up for the 1963 Amateur Boxing Association of England welterweight title, against Johnny Pritchett (Bingham & District ABC), boxing out of West Ham ABC, and as a professional won the British Boxing Board of Control (BBBofC) Southern Area welterweight title, BBBofC British welterweight title, European Boxing Union (EBU) welterweight title, and Commonwealth welterweight title, and was a challenger for the World Boxing Council (WBC) welterweight title, and World Boxing Association (WBA) World welterweight title against José Nápoles, his professional fighting weight varied from 140 lb , i.e. light welterweight to 157 lb , i.e. middleweight. The Indian Professional Boxing Association (Hindi: भारतीय पेशेवर मुक्केबाजी संघ ) is the National Governing Body for Professional Boxing in India, which sanctions professional boxing matches and awards national and subordinate championship titles.  IPBA is a member organization of the World Boxing Association (WBA), the World Boxing Organization (WBO), the International Boxing Federation (IBF) and the Pan Asian Boxing Association (PABA).  It is headquartered in New Delhi, India.
Answer: 17