Question: John Alexander is the uncle of the player who plays what position for Liverpool?

Context paragraphs:
John Alexander Austin House: The John Alexander Austin House is a historic house in Memphis, Tennessee, U.S..  It was built circa 1876 for John Alexander Austin, a veteran of the Confederate States Army during the American Civil War of 1861-1865, and a clothing retailer.  It was designed in the Italianate architectural style.  It has been listed on the National Register of Historic Places since July 12, 1984.

Ivan Alexander of Bulgaria: Ivan Alexander (Bulgarian: Иван Александър , transliterated "Ivan Aleksandǎr"; pronounced ] ; original spelling: ), also sometimes Anglicized as John Alexander, ruled as Emperor ("Tsar") of Bulgaria from 1331 to 1371, during the Second Bulgarian Empire.  The date of his birth is unknown.  He died on 17 February 1371.  The long reign of Ivan Alexander is considered a transitional period in Bulgarian medieval history.  Ivan Alexander began his rule by dealing with internal problems and external threats from Bulgaria's neighbours, the Byzantine Empire and Serbia, as well as leading his empire into a period of economic recovery and cultural and religious renaissance.

John Alexander (footballer, born 1955): John Alexander (born 5 October 1955) is an English former footballer who holds the post of club secretary at Manchester United.  Born in Liverpool, Alexander began his football career with a club called Ulysses, before being picked up by Millwall, for whom he made his league debut in 1976.  After scoring twice in 15 appearances over the course of two years with Millwall, he moved to Reading; he enjoyed greater success with Reading, scoring nine goals in 25 games.  In 1981, he joined Northampton Town, but spent just one season with them before retiring from football at the age of 26 in 1982.  Upon retiring from football, Alexander got a job with the BBC, but he later returned to football as club secretary at Watford.  In 2000, he took up the same post at Tottenham Hotspur, spending 10 years there before applying for the same job at Manchester United, where he would replace the retiring Ken Ramsden.  He took over at Manchester United on 1 July 2010.  He is the uncle of Liverpool player Trent Alexander-Arnold.

John Blair (rugby player): John Alexander Blair (c.1871 – 12 April 1911) was a New Zealand rugby union player who represented the All Blacks in 1897.  His position of choice was hooker.  Blair did not play in any test matches as New Zealand did not play their first until 1903.

The Northern Territories: The Northern Territories was an electronic music project from Sweden.  It was started in Uppsala in 1992 by John Alexander Ericson (vocals, instruments and electronics) and Stefan Sääf (vocals and electronics).  Musically this group centred on synthpop, their first two releases came on German label Machinery Records.  Later their music became more guitar influenced.  John Alexander Ericson started a solo career after their disbanding.

John Alexander Gunn: John Alexander Gunn (1896–1975) was a philosopher who earned his Ph.D. from the University of Liverpool and worked there as a fellow.  He went on to be appointed as a professor at the University of Melbourne in 1923 and retired in 1938.

Trent Alexander-Arnold: Trent John Alexander-Arnold (born 7 October 1998) is an English professional footballer who plays as a right-back for Premier League club Liverpool.  He is an academy graduate of Liverpool and made his senior debut for the club in 2016, aged 18.  The following year, he won the club's Young Player of the Season award.  He has also represented England at all youth levels from under-16 through to under-19.  Due to the length of his name, his surname is shortened to Alexander for Premier League fixtures.

John Alexander Low Waddell: John Alexander Low Waddell (1854 – March 3, 1938, often shortened to J.A.L. Waddell and sometimes known as John Alexander Waddell) was an American civil engineer and prolific bridge designer, with more than a thousand structures to his credit in the United States, Canada, as well as Mexico, Russia, China, Japan, and New Zealand.  Waddell’s work set standards for elevated railroad systems and helped develop materials suitable for large span bridges.  His most important contribution was the development of the steam-powered high-lift bridge.  His design was first used in 1893 for Chicago's South Halsted Street Lift-Bridge over the Chicago River; he went on to design more than 100 other movable bridges, and the company he founded continues to make movable bridges of various types.  Waddell was a widely respected writer on bridge design, and an advocate of quality training of engineers.  Many of Waddell's surviving bridges are now considered historic landmarks.

William Edward Phillips: William Edward Phillips was acting governor of the Prince of Wales' Island on three separate occasions; On the premature death of newly arrived Lieutenant-Governor Charles Andrew Bruce, Dec. 1810 till Archibald Seton arrived in 1811.  On the premature death of Lieutenant-governor William Petrie in 1816 till the arrival of Colonel John Alexander Bannerman in 1817.  On the premature death of Colonel John Alexander Bannerman in 1819 until he was appointed Lieutenant-governor in 1820.  He served as Lieutenant-Governor of Prince of Wales' Island from 4 June 1820 to 30 August 1824.

John Alexander Paul Macgregor: General John Alexander Paul Macgregor (1780 – 5 March 1868), born John Alexander Paul, was an officer in the Bengal Army.

Supporting paragraphs: John Alexander (footballer, born 1955) Trent Alexander-Arnold
Answer: right-back