Context_1 : Broadly speaking, the term racial threat refers to how people react to those of a different race. More specifically, the racial threat hypothesis or racial threat theory proposes that a higher population of members of a minority race results in the dominant race imposing higher levels of social control on the subordinate race, which, according to this hypothesis, occurs as a result of the dominant race fearing the subordinate race's political, economic, or criminal threat. Research has shown a strong association between the size of a state's nonwhite prison population and the likelihood of that state enacting a felon disenfranchisement law, which supports a link between racial threat and the passage of such laws. Context_2 : According to the 2011 census, the total population of the United Kingdom was around 63,182,000. It is the 22nd-largest in the world. Its overall population density is 259 people per square kilometre (671 people per sq mi), with England having a significantly higher population density than Wales, Scotland and Northern Ireland. Almost one-third of the population lives in England's southeast, which is predominantly urban and suburban, with about 8 million in the capital city of London, the population density of which is just over 5,200 per square kilometre (13,468 per sq mi). Context_3 : The Inner city is the central area of a major city or metropolis. Inner city areas tend to have higher population densities than outer suburbs, with more of the population living inside multi-floored townhouses and apartment buildings. Context_4 : Tianshui is the second-largest city in Gansu Province, China. Its population is approximately 3.5 million. The city and its surroundings have played an important role in the early history of China, as still visible in the form of historic sites. Context_5 : Central Falls is a city in Providence County, Rhode Island, United States. The population was 19,376 at the 2010 census. With an area of only 1.29 sqmi , it is the smallest and most densely populated city in the smallest state, and the 27th most densely populated incorporated place in the United States. It is also one of only four incorporated places in New England that have a higher population density than the city of Boston (ranking fourth, behind the Massachusetts cities of Somerville, Chelsea and Cambridge, all inner suburbs of Boston). The city takes its name from a waterfall on the Blackstone River. Context_6 : The Permanent Population Committee (PPC) (Arabic: اللجنة الدائمة للسكان) is a national authority in the state of Qatar whose mission is to realize the aptness of population requirements to sustainable development. To do so, PPC bases its action on Islamic Sharia principles and communal values and traditions in line with the political foundations of the Qatar Permanent Constitution, the National Vision, the relevant Millennium Development Goals (MDGs), the Cooperation Council for the Arab States of the Gulf (GCC) Population Policies and other related regional and international guidelines. The PPC is charged with the responsibility for the implementation of the outcomes identified by the general framework of the GCC population strategy adopted by the GCC Supreme Council during its Nineteenth Session, held in Abu Dhabi UAE in 1998. This strategy prompted each member state to establish a higher population committee responsible for developing national population policies. Accordingly, the PPC was established by the Council of Ministers decision number (24) in 2004 with defined responsibilities and committee membership. His Highness Sheikh Tamim bin Hamad Al Thani, the Deputy Emir and Heir Apparent, endorsed the decision. Context_7 : Xinzheng () is a small county-level city of Zhengzhou in the south of Henan province of Central China. The city has a population of 600,000 people and covers an area of 15 km2 . Context_8 : An eco-city is a city built from the principles of living within environment means. The ultimate goal of many eco-cities is to eliminate all carbon waste (zero-carbon city), to produce energy entirely through renewable resources, and to merge the city harmoniously with the natural environment; however, eco-cities also have the intentions of stimulating economic growth, reducing poverty, using higher population densities, and therefore obtaining higher efficiency, and improving health. Context_9 : The repartition of Ireland has been suggested as a possible solution to the continuing political disagreement in Northern Ireland. The essential problem was that the partition of Ireland was gerrymandered, and as a result Northern Ireland contains a large Irish nationalist minority. Much of the Irish nationalist population lives in the south and west of the region, but a significant percentage lives in Belfast and some smaller communities in the north and east, whilst Irish unionists constitute a majority of the population in the north and east of the region with some smaller communities in the south and west. The geographical area in which unionists are a majority is less than half of Northern Ireland (see graphic below), but eastern areas have a much higher population density. Collectively, Northern Ireland is split, with unionists comprising approximately 48% of the population, and falling quickly. At the last general election unionists secured precisely 50% of the seats. None of these proposals are currently supported by any political party in Ireland. Context_10 : Lake View, also spelled Lakeview, is one of the 77 community areas of Chicago, Illinois, located on the city's North Side. It is bordered by West Diversey Parkway on the south, West Irving Park Road on the north, North Ravenswood Avenue on the west, and the shore of Lake Michigan on the east. The Uptown community area is to Lakeview's north, Lincoln Square to its northwest, North Center to its west and Lincoln Park to its south. The 2014 population of Lakeview was 97,968 residents, making it the second largest of the Chicago community areas by population, following Austin which has 98,514 residents. Lakeview, though, has a higher population density than the larger-in-area Austin neighborhood. fact_1 :  The city has a population of 600,000 people and covers an area of 15 km2 . fact_2 : Tianshui is the second-largest city in Gansu Province, China. fact_3 :  Its population is approximately 3.5 million. Question: Which city has a higher population, Xinzheng or Tianshui?
Output: Tianshui