Question: The city where Turkish Statistical Institute has its headquarters in has a population of what in the urban center?

Context paragraphs:
Core-based statistical area: A Core Based Statistical Area (CBSA) is a U.S. geographic area defined by the Office of Management and Budget (OMB) that consists of one or more counties (or equivalents) anchored by an urban center of at least 10,000 people plus adjacent counties that are socioeconomically tied to the urban center by commuting.  Areas defined on the basis of these standards applied to Census 2000 data were announced by OMB in June 2003.  These standards are used to replace the definitions of metropolitan areas that were defined in 1990.  The OMB released new standards based on the 2010 Census on July 15, 2015.

Urban Center (art gallery): The Urban Center is a gallery on Madison Avenue in manhattan, New York City which is run by the Municipal Art Society (MAS).  The gallery serves to champion the fields of urban planning and design in New York, and is also the site of MAS' community development workshops, seminars, lectures, and other educational programs.  The Urban Center also includes a book store which specializes in architecture, urban planning, urban design, and environmental studies.

Ankara: Ankara (  ;  ] ), formerly known as Ancyra (Greek: Ἄγκυρα ) and Angora, is the capital of the Republic of Turkey.  With a population of 4,587,558 in the urban center and 5,150,072 in its province , it is Turkey's second largest city after former imperial capital Istanbul, having overtaken İzmir.  The former Metropolitan archbishopric remains a triple titular see (Latin, Armenian Catholic and Orthodox).

Turkish Statistical Institute: Turkish Statistical Institute (commonly known as TurkStat; Turkish: "Türkiye İstatistik Kurumu" or TÜİK) is the Turkish government agency commissioned with producing official statistics on Turkey, its population, resources, economy, society, and culture.  It was founded in 1926 and has its headquarters in Ankara.

Unemployment in Turkey: Unemployment in Turkey measured by the Office of National Statistics show unemployment in Turkey at 3 647 000 (12.7%) as of December 2017.  Though unemployment is a general problem for the whole world, the degree of unemployment in Turkey is especially high in respect to the other countries in the region at the same economic level.  In the year 2017, the data on "youth unemployment", which indicates unemployment between 15 and 25 according to the data of the Turkish Statistical Institute (TUİK), showed a worse performance than the general unemployment rate and increased by 4.8 percentage points to 24 percent.

Bo, Sierra Leone: Bo, also commonly referred to as Bo Town, is the second largest city in Sierra Leone (after Freetown) and the largest city in the Southern Province.  Bo is the capital and administrative center of Bo District.  The city of Bo has an estimated population of 306,000.  Bo is an urban center, and lies approximately 160 miles (250 km) east south-east of Freetown.  After Freetown, Bo is the leading financial, educational, commercial and urban center of Sierra Leone.

Urban agglomeration: In the study of human settlements, an urban agglomeration is an extended city or town area comprising the built-up area of a central place (usually a municipality) and any suburbs linked by continuous urban area.  INSEE, the French Statistical Institute, uses the term "unité urbaine", which means continuous urbanized area.  However, because of different definitions of what constitutes an "agglomeration", as well as variations and limitations in statistical or geographical methodology, it can be problematic to compare different agglomerations around the world.  It may not be clear, for instance, whether an area should be considered to be a satellite and part of an agglomeration, or a distinct entity in itself.

SCORUS: An acronym for "Standing Committee of Regional and Urban Statistics", SCORUS is a sub-committee of the International Association for Official Statistics (IAOS) which is a section of the International Statistical Institute.  The sub-committee has specific responsibility for regional and urban statistics and research.  Its members form a dedicated international network of persons interested in regional and urban statistical issues.

2013 Turkish local government reorganisation: Municipalities (Turkish: "belediyeler" ) are the basic units of local government in Turkey.  According to the Turkish Statistical Institute the population of Turkey was 76,667,864 as of 31 December 2013.  The majority of the population live in settlements with municipalities.  The number of municipalities in Turkey was 2,947 in 2009.  But in 2013, most of the small town (Turkish: "belde" ) municipalities were merged to district (Turkish: "ilçe" ) municipalities by the Act 6360 which came into effect at the 2014 local elections sharply decreased the number of municipalities to 1,394.

Bani K Mallick: Bani K. Mallick is a Distinguished Professor and Susan M. Arseven `75 Chair in Data Science and Computational Statistics in the Department of Statistics at Texas A&M University in College Station.  He is the Director of the Center for Statistical Bioinformatics.  Dr. Mallick is well known for his contribution to the theory and practice of Bayesian Semiparametric methods and Uncertainty Quantification.  Mallick is an elected fellow of American Association for the Advancement of Science, American Statistical Association, Institute of Mathematical Statistics, International Statistical Institute and the Royal Statistical Society.  He received the Distinguished research award from Texas A&M University and the Young Researcher award from the International Indian Statistical Association.

Supporting paragraphs: Turkish Statistical Institute Ankara
Answer: 4,587,558