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.
River ward is a political division returning three Councillors to the London Borough of Barking and Dagenham.
 Elected representation is by Inder Singh Jamu, Liam Smith, and Patricia Twomey, all of the Labour Party (UK).
Smith and Dimon Shipyard or just Smith & Dimon was a renowned shipyard on the east side of Manhattan during the 1840s.
 The shipyard was located along the East River between 4th and 5th Street.
 Founded by partners Stephen Smith (1794–1875) and John Dimon (1795–1879).
 Dimon was in charge of the more profitable ship repair business and described the partnership saying, "Smith builds the ships, I make the money."
 John W. Griffiths was a famed naval architect who designed revolutionary, fast clipper ships for Smith & Dimon.
 The shipyard became famous for its work in the 1840s under the name Smith & Dimon.
 It was formerly Blossom, Smith and Dimon in the 1820s and then Smith, Dimon and Comstock in the 1830s.
Stephen Francis Smith (born 22 July 1984 is a British professional boxer.
 He is the current WBC Silver super featherweight champion and a former British featherweight and British super featherweight champion, he is also a former Commonwealth featherweight champion.
In mathematics, the Smith normal form is a normal form that can be defined for any matrix (not necessarily square) with entries in a principal ideal domain (PID).
 The Smith normal form of a matrix is diagonal, and can be obtained from the original matrix by multiplying on the left and right by invertible square matrices.
 In particular, the integers are a PID, so one can always calculate the Smith normal form of an integer matrix.
 The Smith normal form is very useful for working with finitely generated modules over a PID, and in particular for deducing the structure of a quotient of a free module.
 It is named for the British mathematician Henry John Stephen Smith.
Henry John Stephen Smith (2 November 1826 – 9 February 1883) was a mathematician remembered for his work in elementary divisors, quadratic forms, and Smith–Minkowski–Siegel mass formula in number theory.
 In matrix theory he is visible today in having his name on the Smith normal form of a matrix.
Stephen Hector Taylor-Smith (4 February 1891 – 15 February 1951) often known as Stephen Smith, was a pioneering Indian aerospace engineer who developed techniques in delivering mail by rocket.
 Unlike Friedrich Schmiedl, whom the Austrian Authorities banned from further experimenting, Smith was encouraged in his experiments by Indian Officials.
 In the ten-year span of his experiments (1934-1944), Smith made some 270 launches, including at least 80 rocket mail flights.
Liam Smith (born 27 July 1988) is a British professional boxer.
 He held the WBO light-middleweight title from 2015 to 2016, having previously held the Commonwealth light-middleweight title from 2012 to 2013, and the British light-middleweight title from 2013 to 2015.
 Liam is the younger brother of Paul Smith and Stephen Smith, and the older brother of Callum Smith; all of whom are also professional boxers.
Liam Smith (born 10 April 1996) is a Scottish footballer who plays as a defender for St Mirren, on loan from Heart of Midlothian.
 He has previously played for East Fife & Raith Rovers on loan deals.
Archelaus Smith (23 April 1734 - 3 April 1821), was a tanner, shoemaker and early settler of Barrington, Nova Scotia.
 He was born in Chatham, Massachusetts to parents Deacon Stephen Smith (c.1706-1766) and Bathsheba (Brown) Smith (1709–1766).
 He was christened in the Congregational Church, Chatham, Massachusetts on 23 Apr 1734.
 At eighteen years of age he married Elizabeth Nickerson (1735–1828), daughter of William Nickerson (1701–1763) and Sarah (Covell) Nickerson (c.1706-b.1790), in Chatham, in a ceremony performed by the Reverend Stephen Emerey.
 They had eight children (three boys and five girls).

Question: Both Liam Smith and Stephen Smith are considered what?
Answer: British professional boxer