Question: Oxford is the 52nd largest city where?

full_context: Document 1: Exeter: Exeter ( ) is a cathedral city in Devon England with a population of 129,800 (mid-2016 est. ). It lies within the county of Devon, of which it is the county town as well as the home of Devon County Council. The administrative area has the status of a non-metropolitan district under the administration of the County Council; a plan to grant the city unitary authority status was scrapped under the 2010 coalition government. The city is on the River Exe about 37 mi northeast of Plymouth and 70 mi southwest of Bristol.
Document 2: Merton Street: Merton Street is a historic and picturesque cobbled street in central Oxford, England. It joins the High Street at its northeastern end, between the Ruskin School of Drawing and Fine Art (together with the Examination Schools) and the Eastgate Hotel at the historic east gate of the city. It then runs east-west, parallel and to the south of the High Street for most of its length.
Document 3: Alfred Street: Alfred Street is a street running between the High Street to the north and the junction with Blue Boar Street and Bear Lane at the southern end, in central Oxford, England. To the south is Christ Church, one of Oxford University's historic colleges.
Document 4: Donnington Bridge Road: Donnington Bridge Road is a road in south Oxford, England, in the estate of Donnington.
Document 5: Bricklayers' Arms: Bricklayers' Arms is a busy road intersection between the A2 and the London Inner Ring Road in south London, England. It is the junction of Tower Bridge Road, Old Kent Road, New Kent Road and Great Dover Street; Old Kent Road and New Kent Road are connected eastbound-only by a flyover.
Document 6: Bristol: Bristol ( ) is a city and county in South West England with a population of 454,200 in 2017. The district has the 10th-largest population in England, while the Bristol metropolitan area is the 12th-largest in the United Kingdom. The city borders North Somerset and South Gloucestershire, with the cities of Bath and Gloucester to the south-east and north-east, respectively.
Document 7: South East England: South East England is the most populous of the nine official regions of England at the first level of NUTS for statistical purposes. It consists of Berkshire, Buckinghamshire, East Sussex, Hampshire, the Isle of Wight, Kent, Oxfordshire, Surrey and West Sussex. As with the other regions of England, apart from Greater London, the south east has no elected government.
Document 8: New Kent Road: New Kent Road is a 1 km road in the London Borough of Southwark. The road was created in 1751 when the Turnpike Trust upgraded a local footpath. This was done as part of the general road improvements associated with the creation of Westminster Bridge; in effect it was possible to travel from the West End/ Westminster to the south-east without having to go via the Borough of Southwark but could now cross St George's Fields to the junction of Newington Causeway and Newington Butts which is where New Kent Road starts at Elephant and Castle. The route runs eastward for a few hundred yards to the junction of Great Dover Street and Tower Bridge Road, known as Bricklayers' Arms, where it joins the original route to the south-east Old Kent Road (the A2).
Document 9: Bridge Road, Melbourne: Bridge Road is a major shopping strip in Melbourne, Australia. It is best known for its abundance of clothing factory outlets, which makes it a popular tourist attraction. There are also many stores featuring up-and-coming local fashion designers, cafes and other restaurants.
Document 10: Queen's Lane: Queen's Lane is a historic street in central Oxford, England, named after Queen's College, to the south and west. St Edmund Hall, a constituent college of the University of Oxford, is located on the southern end of this street.
Document 11: Oxford, Maine: Oxford is a town in Oxford County, Maine, United States. The population was 4,110 at the 2010 census. Oxford is home to the Oxford Plains Speedway, the annual Oxford County Fair, and Oxford Casino. The town includes the village of Welchville.
Document 12: Dunedin Street Circuit: Dunedin Street Circuit is a temporary street circuit for classic and club racers following some of Dunedin's 1950s street circuit. It is situated at the southern end of Dunedin's city centre, some 1500 metres south of The Octagon. The 2.9km circuit is a combination of flat and gently hilly sections, the circuit uses several of Dunedin's main streets, including the Dunedin Southern Motorway extension along the southern edge of the Oval sports grounds and the southern end of Princes Street. The highest point on the circuit is a winding hill section at the southwestern end of the course (shown at the right on the map), which immediately follows a sharp hairpin bend at the end of the motorway extension. This section initially climbs then drops down to a flat section which includes Princes Street and which runs along two sides of the Oval (actually a triangular area of ground), before again meeting the motorway extension.
Document 13: Oxford: Oxford ( ) is a city in the South East region of England and the county town of Oxfordshire. With an estimated 2015 population of 168,270, it is the 52nd largest city in the United Kingdom, and one of the fastest growing and most ethnically diverse. The city is situated 57 mi from London, 69 mi from Bristol, 65 mi from both Southampton and Birmingham and 25 mi from Reading.
Document 14: Cambridge: Cambridge ( ) is a university city and the county town of Cambridgeshire, England, on the River Cam approximately 50 mi north of London. At the United Kingdom Census 2011, its population was 123,867, including 24,488 students.
Document 15: Oxford-Cambridge Arc: The Oxford-Cambridge Arc is a notional arc of agricultural and urban land at about 75km (about 50 miles) radius of London, southern England. It runs between the two English university towns of Oxford and Cambridge via Milton Keynes and other important settlements in Cambridgeshire, Bedfordshire, Buckinghamshire and Oxfordshire, at the northern rim of the London commuter belt. It is significant only in economic geography, with little physical geography in common.
ground_truth: United Kingdom