Wladimir Wladimirowitsch Klitschko (born 25 March 1976) is a Ukrainian former professional boxer who competed from 1996 to 2017.
 He is a two-time world heavyweight champion, having held the WBA (Super), IBF and WBO titles, as well as the IBO, "Ring" magazine, and lineal titles.
 A strategic and intelligent boxer, Klitschko is considered to be one of the greatest heavyweight champions of all time.
 He was known for his exceptional knockout power, utilising a strong jab, straight right hand and left hook.
Guy "Arc Angel" Waters ( (1964--) 25 1964 (age (2017)-(1964)-((11)<(01)or(11)==(01)and(30)<(25)) ) ) is an Australian professional welter/light middle/middle/super middle/light heavy/cruiserweight boxer of the 1980s, 1990s and 2000s who won the New South Wales State (Australia) light heavyweight title, Australian light heavyweight title, Oriental and Pacific Boxing Federation (OPBF) light heavyweight title, Australasian Light Heavyweight Title, World Boxing Federation (WBF) light heavyweight title, International Boxing Federation (IBF) Pan Pacific super middleweight title, Oriental and Pacific Boxing Federation (OPBF) super middleweight title, and Commonwealth light heavyweight title, and was a challenger for the WBC light heavyweight title against Dennis Andries, World Boxing Association (WBA) World light heavyweight title against Virgil Hill, World Boxing Council (WBC) cruiserweight title against Juan Carlos Gómez, and Commonwealth super middleweight title against David Starie, his professional fighting weight varied from 167+1/2 lb , i.e. super middleweight to 185+1/4 lb , i.e. cruiserweight.
"Battling" Jim Johnson (September 2, 1887 – November 6, 1918) was an American boxer who fought as a heavyweight from 1908 to 1918.
 He had little success and lost with great frequency to top boxers such as Sam Langford, Joe Jeanette, Sam McVey, Harry Wills and Kid Norfolk.
 In spite of this (or because of it), Jack Johnson, the first black world heavyweight champion, gave him a title shot.
 When they fought in Paris in August 1913, it was the first time that two black boxers had fought for the world heavyweight title.
 Battling Jim was the only black fighter Johnson faced during his reign as heavyweight champ from 1908 to 1915.
Petty officer Matthew 'Nutty' Curran (1882–1938 (aged 56)) born in Lisdeen, Kilkee was an Irish professional cruiser/heavyweight boxer of the 1900s, '10s and '20s, who won the Irish heavyweight title, British heavyweight title (as this bout didn't take place at National Sporting Club premises at 43 King Street, Covent Garden, London, this and subsequent British heavyweight title bouts featuring Matthew 'Nutty' Curran were not recognised by the National Sporting Club (NSC), nor retrospectively by the British Boxing Board of Control), and British Empire heavyweight title, and challenged for the British Boxing Board of Control British heavyweight title, his professional fighting weight varied from 178 lb , i.e. Cruiserweight to 199 lb , i.e. Heavyweight.
 Matthew Curran's nickname of 'Nutty' came about because "he would foul you early on or he went so crazy that he railroaded you into fouling him", 'Nutty' being slang for a crazy person, i.e. one who suffers from insanity.
Robert Lloyd "Bob" Foster (December 15, 1938 – November 21, 2015) was an American professional boxer who fought as a light heavyweight and heavyweight.
 Known as "The Deputy Sheriff", Foster was one of the greatest light heavyweight champions in boxing history.
 He won the world light heavyweight title from Dick Tiger in 1968 via fourth-round knockout, and went on to defend his crown fourteen times in total from 1968 to 1974.
 Foster challenged heavyweight kings Joe Frazier and Muhammad Ali during his career, but was knocked out by both fighters (the fight with Ali was not for a world heavyweight title, but for the regional NABF version).
Neil "Simmo" Simpson ( (1974--) 23 1974 (age (2017)-(1974)-((11)<(01)or(11)==(01)and(30)<(23)) ) ) born in London, now based in Coventry, is an English professional light heavy/cruiser/heavyweight boxer of the 1990s and 2000s, who won the British Boxing Board of Control (BBBofC) Midlands Area light heavyweight title, BBBofC British light heavyweight title, British Masters Cruiserweight title, and Commonwealth light heavyweight title, and was a challenger for the International Boxing Organization (IBO) Inter-Continental light heavyweight title against Darren Corbett, European Boxing Union (EBU) light heavyweight title against Yawe Davis, World Boxing Union (WBU) light heavyweight title against Tony Oakey, and BBBofC British light heavyweight title against Peter Oboh, his professional fighting weight varied from 169 lb , i.e. light heavyweight to 216 lb , i.e. heavyweight.
Steve Aczel ( (1954--) 08 1954 (age (2017)-(1954)-((11)<(09)or(11)==(09)and(30)<(08)) ) ) born in Budapest is an Australian professional light heavy/cruiser/heavyweight boxer of the 1980s, '90s and 2000s who won the Australasian light heavyweight title, Australian light heavyweight title, Australian heavyweight title, Oriental and Pacific Boxing Federation (OPBF) heavyweight title, Queensland State (Australia) heavyweight title, and Commonwealth light heavyweight title, drew with Maile Haumona for the South Pacific heavyweight title, and was a challenger for the Australian cruiserweight title against Tony Mundine, and Commonwealth cruiserweight title against Stewart Lithgo, his professional fighting weight varied from 172 lb , i.e. light heavyweight to 203+1/2 lb , i.e. heavyweight.
 He was inducted into the Australian National Boxing Hall of Fame in 2011.
Jameel McCline (born May 20, 1970) is an American former professional boxer.
 He challenged for the world heavyweight title on an unprecedented four occasions, losing all four attempts to Wladimir Klitschko, Chris Byrd, Nikolai Valuev and Samuel Peter.
 Despite never winning a world title, McCline did defeat former champions and top contenders in Michael Grant, Lance Whitaker, Al Cole, and Shannon Briggs.
 McCline retired in 2012 at the age of 42.
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.
Gary Delaney ( (1970--) 12 1970 (age (2017)-(1970)-((11)<(08)or(11)==(08)and(30)<(12)) ) ) born in Newham is an English professional light heavy/cruiser/heavyweight boxer of the 1990s and 2000s.
 He won the British Boxing Board of Control (BBBofC) Southern Area light heavyweight title, World Boxing Board (WBB) light heavyweight title, World Boxing Organization (WBO) Inter-Continental light heavyweight title, BBBofC Southern Area cruiserweight title, and Commonwealth light heavyweight title (twice), and was a challenger for the BBBofC British heavyweight title, and Commonwealth heavyweight title against Julius Francis, World Boxing Organization (WBO) Inter-Continental cruiserweight title against John Keeton, and Jesper Kristiansen, BBBofC British cruiserweight title, and Commonwealth (British Empire) cruiserweight title against Bruce Scott, and World Boxing Union cruiserweight title against Sebastiaan Rothmann, and Enzo Maccarinelli, his professional fighting weight varied from 174 lb , i.e. light heavyweight to 231 lb , i.e. heavyweight.

Question: Jameel McCline lost four attempts at the world heavyweight title to a boxer of what nationality?
Answer: Ukrainian