David F. Thwaites was an aviator in the United States Army Air Corps during World War II.
 He became a fighter ace piloting the P-47 Thunderbolt as a member of the 361st Fighter Squadron of the 356th Fighter Group.
 Thwaites, based out of RAF Martlesham Heath in England was the second highest scoring pilot in his squadron, with six confirmed victories and the only pilot of the 356th FG to score all of his victories while serving with the group.
 He scored his victories using three different P-47s however he nicknamed them all "Polly".
 Following the completion of his tour in September 1944 he returned to the United States and became an instructor.
Since the inception of the Rugby World Cup in 1987, a total of 56 players have scored three tries or drop goals (a hat-trick) in a single match.
 The first player to achieve the feat was Craig Green, who scored four tries in New Zealand's 74–13 victory over Fiji during the 1987 Rugby World Cup.
 His teammate John Gallagher also scored four tries in this match.
 Besides Green and Gallagher, fourteen players have scored more than three tries in a match; of these, Chris Latham and Josh Lewsey have scored five, while Marc Ellis scored six in New Zealand's 145–17 victory against Japan in 1995.
 Two of Ellis's teammates, Eric Rush and Jeff Wilson, also scored hat-tricks in this game.
 Four players have scored a hat-trick of drop goals: Jannie De Beer, Jonny Wilkinson, Juan Martín Hernández and Theuns Kotzé.
 Of these, De Beer scored the most in one match, with five drop goals in South Africa's 44–21 victory over England in the 1999 Rugby World Cup.
Otto Kissenberth (26 February 1893 – 2 August 1919) was a German flying ace of World War I credited with 20 aerial victories.
 He was a prewar mechanical engineer who joined the German air service in 1914.
 After being trained and after serving as a reconnaissance pilot, he became one of the first German fighter pilots, flying with "Kampfeinsitzerkommando" (Combat Single-Seater Command) KEK Einsisheim.
 He scored six victories with this unit as it morphed into a fighter squadron, "Jagdstaffel 16".
 His success brought him command of "Jagdstaffel 23" on 4 August 1917.
 He would run his victory tally to 20, downing his final victim using a captured British Sopwith Camel on 20 May 1918.
 Nine days later, a crash while flying the Camel ended Kissenberth's combat career.
 His injuries were severe enough he was not returned to combat, instead being assigned to command Schleissheim's flying school.
 Although Otto Kissenberth survived the war, he died soon after in a mountaineering accident on 2 August 1919.
John "Darkie" Smith (born 1942) is a British former boxer, now employed in boxing training and boxing matchmaking.
 By birth a Romany Gypsy, Darkie fought in the UK until the age of 30.
 He served an apprenticeship under the pro trainer George Francis before setting out on his own.
 Smith has worked as a trainer in the UK, France, Spain, Majorca, the USA and Germany.
 Fighters trained to world titles include heavyweight Herbie Hide, light heavyweight and cruiserweight Fabrice Tiozzo, super middleweight Christophe Tiozzo and light welterweight Stephen Smith.
 He has also trained European, Commonwealth and British champions, and worked with other future champions during the early stages of their careers.
 These fighters include European Heavyweight Champion Zeljko Mavrovic and future world champion Chris Eubank.
 Darkie's work with Mavrovic drew much attention.
 Mavrovic was trained exclusively by Smith for five years, winning and defending his European title and finishing with a record of one defeat in thirty bouts.
 The one defeat amounted to a points decision against world champion Lennox Lewis, in a bout that saw Mavrovic concede a significant weight advantage.
Wayne Elcock (born 12 February 1974) is a British former professional boxer.
 Who was managed by Frank Maloney at the start of his career and promoted by Panix promotions before moving after 2 winning fights to Frank Warren, then later to Mick Hennessy.
 Elcock was trained in Leicester to begin with by Jez brogan, before moving to London to be trained by both Frank Maloney and Alan Smith, along with several visits to america to build on his skills, where Wayne worked with Goody Petronelli the trainer of former world champions Marvelous Marvin Hagler and Steve Collins at his famous Brockton gym.
 Wayne came back to his home town to team up with Birmingham's most successful boxing trainers brothers Paddy & Tommy Lynch.
 Knocking out fellow contender Darren Rhodes in 1 minute 30 seconds in Elcocks homecoming and first ever fight with the Lynch brothers in Birmingham at a sold out Aston Events Centre, this setting up his first attempt at the prestigious British title Lonsdale Belt against Plymouth's Scott Dann (boxer) in the first British title fight to ever be scored by three judges, after defeat Wayne bounced back with two back to back knockout victories one of them a British title eliminator winning by TKO against Scotland's Lawrence Murphy, who was the only other boxer to have beaten Elcock, In Wayne's next contest he faced the English champion Steven Bendall who was to be yet another stopped, but this time over eight punishing rounds and setting up his next contest where he would become the first British boxer to beat long standing British champion Howard Eastman to win the coveted Lonsdale Belt in 2007, Elcock also won the Commonwealth title and the minor WBU World Middleweight title becoming the first Birmingham born fighter to ever hold a version of a World title.
 Elcock challenged for the IBF middleweight title against the unbeaten World champion Arthur Abraham on 8 December 2007, losing by a fifth round knockout.
 Wayne bounced back from his world title attempt defending the lonsdale belt with a TKO win against local Dudley rival Darren McDermott, before losing the next defence to fellow Birmingham fighter Matthew Macklin in the Battle of Brum Elcock retired at the age of 36 in 2009 to concentrate fully on his other business matters and today Wayne can be found mentoring in schools and behind the counter at Mad Dog's Boxing shop in Boldmere, Birmingham, as well as coaching in the evening at the multi award winning company Wayne Elcock's Box Clever and at his own amateur boxing club Wayne Elcock's Boxing Academy, located in Chelmsley Wood, not far from where he grew up.
Pierre Le Gloan (6 January 1913 – 11 September 1943) was a French flying ace of World War II.
 Unique in the annals of wartime flying, he scored victories against German, Italian and British foes.
Lieutenant Albert Victor Tonkin was a World War I flying ace credited with six aerial victories.
 He worked as a grocer pre-war.
 He originally joined No. 10 Machine Gun Company in the Australian Imperial Force.
 On 19 September 1917, he joined 1 Squadron AFC and was posted to Egypt for training.
 He re-joined the squadron as a pilot on 10 January 1918; he flew Royal Aircraft Factory BE 2Bs against the Turks and Germans.
 He scored six confirmed victories, and had three unconfirmed victories on 22 July 1918, when he strafed three Albatros D.Vs he had forced to land.
 On 10 August, he persisted in chasing a Rumpler 50 mi in an attempt to bring it to battle.
 On 13 August, engine trouble forced Tonkin and his observer to land.
 They were captured by local Arabs, who ransomed them back to the British for a hundred sovereigns.
 On 19 September, they were brought down by anti-aircraft fire and taken prisoner, only to be repatriated by rescuing cavalry.
Captain John William Aldred {'1': ", '2': ", '3': ", '4': "} was an English World War I flying ace credited with eight aerial victories.
 He began military service in World War I as an infantryman and transferred to flight duty as an observer.
 After scoring two aerial victories and winning the Military Cross, he qualified as a fighter pilot, scored six more triumphs, and earned a Bar to his MC in lieu of a second award.
S-7 was a "Stalinets"-class submarine of the Soviet Navy.
 Her keel was laid down by Krasnoye Sormovo in Gorkiy on 14 December 1936.
 She was launched on 5 April 1937 and commissioned on 30 June 1940 in the Baltic Fleet.
 During World War II, the submarine was under the command of Captain Sergei Prokofievich Lisin and took part in the Soviet submarine campaign on 1942 in Baltic Sea.
 "S-7" scored victories, but was sunk in action.
Christopher Livingstone Eubanks (born 8 August 1966), known as Chris Eubank, is a British former professional boxer who competed from 1985 to 1998.
 He held the WBO middleweight and super-middleweight titles, scoring victories over six world champions, and is ranked by BoxRec as the third best British super-middleweight boxer of all time.

Question: John "Darkie" Smith trained a boxer who scored victories over six what?
Answer: world champions