Question: Udo Proksch was born in a city that had how many residents on 1 January 2017 ?

Context paragraphs:
Abu Omar al-Turkistani: Abu Omar al-Turkistani (died 1 January 2017) was a high-ranking commander for several al-Qaeda-affiliated groups, such as the Islamic Jihad Union (IJU), the Al-Nusra Front, and the Turkistan Islamic Party in Syria (TIP).  Active as a militant since at least 2001, al-Turkistani fought in both the War in Afghanistan and the Syrian Civil War.  By late 2016, he was considered to be "one of top ten leading 'jihadists' in Syria", and one of the "four most prominent leaders" of TIP.  Shortly before his death, al-Turkistani helped to facilitate the merger of many Islamist rebel groups into Tahrir al-Sham.  He was eventually killed by an American drone strike on 1 January 2017.

Sandefjord:    is a city and municipality in Vestfold county, Norway.  The administrative centre of the municipality is the city of Sandefjord.  The municipality of Sandefjord was established on 1 January 1838 (see formannskapsdistrikt).  The rural municipality of Sandar was merged into the municipality of Sandefjord on 1 January 1968.  On 1 January 2017, the municipalities of Andebu and Stokke was merged into Sandefjord as a part of Norway's nationwide municipal reform.  These municipalities were the first ones to be merged in the municipal reform.

Peter Turkson: Peter Kodwo Appiah Turkson (born 11 October 1948) is a Ghanaian cardinal of the Roman Catholic Church.  He was president of the Pontifical Council for Justice and Peace from 24 October 2009 to 1 January 2017.  Pope Francis named him the first prefect of the Dicastery for the Promotion of Integral Human Development, which began operations on 1 January 2017.

Communauté de communes Terroir de Caux: The Communauté de communes Terroir de Caux is a "communauté de communes" in the Seine-Maritime "département" and in the Normandy "région" of France.  It was formed on 1 January 2017 by the merger of the former Communauté de communes des Trois Rivières, Communauté de Communes Saâne et Vienne, Communauté de communes de Varenne et Scie and 3 communes from the former Communauté de communes du Bosc d'Eawy on 1 January 2017.  Its seat is in Bacqueville-en-Caux.

List of neighborhoods in Denver: The City and County of Denver, capital of the U.S. state of Colorado, has 78 official neighborhoods as of January 2013.  In addition to the official administrative neighborhoods, many residents have names for local neighborhoods that may not conform to the boundaries of official neighborhoods.  Denver does not have any official larger area designations, unlike the City of Chicago for example, which has larger areas that house the neighborhoods (IE: Northwest Side).  Denver residents use the terms "north" "south" "east" and "west" loosely, and the neighborhoods as categorized below reflect this.

Moret-Loing-et-Orvanne: Moret-Loing-et-Orvanne is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.  Moret-sur-Loing is the municipal seat.  The municipality was established on 1 January 2016 and consists of the former communes of Épisy, Montarlot and "Orvanne".  "Orvanne" was the result of the merger, on 1 January 2015, of the communes of Moret-sur-Loing and Écuelles.  On 1 January 2017, the former commune of Veneux-les-Sablons was merged into Moret-Loing-et-Orvanne.

Communauté de communes des 4 rivières: The Communauté de communes des 4 rivières is a "communauté de communes" in the Seine-Maritime and Eure "départements" and in the Normandy "région" of France.  It was formed on 1 January 2017 by the merger of the former Communauté de communes du Bray-Normand, Communauté de communes du Canton de Forges-les-Eaux and Communauté de communes des Monts et de l'Andelle on 1 January 2017.  It consists of 54 communes (of which 2 in Eure), and its seat is in Gournay-en-Bray.

Udo Proksch: Udo Proksch (May 29, 1934 in Rostock, Germany – June 27, 2001 in Graz, Austria) was an Austrian businessman and industrialist.  In 1991, he was convicted of the murder of six people as part of a major insurance fraud.  Proksch died in prison.

Graz: Graz (] ) is the capital of Styria and the second-largest city in Austria after Vienna.  On 1 January 2017, it had a population of 320,587 (of which 286,686 had principal residence status).  In 2015, the population of the Graz larger urban zone who had principal residence status stood at 613,286.

Communauté de communes Bray-Eawy: The Communauté de communes Bray-Eawy is a "communauté de communes" in the Seine-Maritime "département" and in the Normandy "région" of France.  It was formed on 1 January 2017 by the merger of the former Communauté de communes du Pays Neufchâtelois, Communauté de communes de Saint-Saëns-Portes de Bray and 8 communes from the former Communauté de communes du Bosc d'Eawy on 1 January 2017.  It consists of 46 communes, and its seat is in Neufchâtel-en-Bray.

Supporting paragraphs: Udo Proksch Graz
Answer: 320,587