Question: No. 11 Squadron is based at an airbase 25 km north of the center of what city?

Context paragraphs:
No. 11 Squadron RCAF: No. 11 Squadron RCAF was a Royal Canadian Air Force squadron that was active during the Second World War.  It was primarily used in an anti-submarine role and was based on the east coast of Canada and Newfoundland.  In 1945 it moved bases to Patricia Bay, British Columbia.  The squadron flew the Lockheed Hudson and Consolidated B-24 Liberator before disbanding on 15 September.

Białystok County: Białystok County (Polish: "powiat białostocki" ) is a unit of territorial administration and local government (powiat) in Podlaskie Voivodeship, north-eastern Poland, on the border with Belarus.  It was created on 1 January 1999 as a result of the Polish local government reforms passed in 1998.  Its administrative seat is the city of Białystok, although the city is not part of the county (it constitutes a separate city county).  The county contains nine towns: Łapy, 25 km south-west of Białystok, Czarna Białostocka, 22 km north of Białystok, Wasilków, 11 km north of Białystok, Choroszcz, 13 km west of Białystok, Supraśl, 16 km north-east of Białystok, Michałowo, 13 km east of Białystok, Zabłudów, 16 km south-east of Białystok, Tykocin, 29 km west of Białystok, and Suraż, 23 km south-west of Białystok.

No. 11 Squadron RAF: No. 11 Squadron of the Royal Flying Corps was formed at Netheravon in Wiltshire on 14 February 1915 for "fighting duties", receiving two seat pusher Vickers Gunbus fighters in June, and deploying to France on 25 July 1915.  Since all previous squadrons (Royal Flying Corps or other nations) were reconnaissance or army co-operation units, 11 can make a claim to be the oldest dedicated fighter squadron in the world.  The squadron has had the honour of having two Victoria Cross winners serve in the unit.

Hamadan Airbase: Hamadan Airbase (IATA: NUJ, ICAO: OIHS) or Shahrokhi Airbase or Noje Airbase (Persian: پایگاه هوایی شهید نوژه‎ ‎ ) is an Islamic Republic of Iran Air Force base located 47km north of Hamadan in the Hamadān Province.  The airbase is named after Captain Mohammad Noje who was the first IRIAF pilot to be killed in action on August 16, 1979.  The Nojeh coup plot took place there in 1980.

Janardanaswamy Temple: Janardana Swami Temple is a 2000-year-old temple situated in Varkala, Thiruvananthapuram.  It is also known as Varkala Temple.  Janardana Swami is a form of Lord Vishnu.  It is a very well known temple in Kerala about 10.9 km west of Kallambalam on NH 66 near sea, 25 km north of Thiruvananthapuram city, 13 km south of famous backwater destination Paravur and 2 km from Varkala Sivagiri railway station,14 km north west of biggest town Attingal.  It is situated near the Arabian sea shore.It is referred to as Dakshin Kashi (Benares of the south).  The temple is located close to the Papanasam beach, which is considered to have medicinal properties since the waters wash the nearby medicinal plants.  It is also an important Ayurveda treatment center.  The temple has an ancient bell removed from a shipwreck, donated by the captain of the Dutch vessel which sank near Varkala without causing any casualties.

Nordholz Naval Airbase: Nordholz Naval Airbase (German: Fliegerhorst Nordholz ) (IATA: NDZ, ICAO: ETMN) is a German Naval Air base located near the town of Nordholz in Lower Saxony, 25 km north of Bremerhaven, and 12 km southwest of Cuxhaven.  It is the home of Naval Air Command (Marinefliegerkommando), with the Naval Air Wing 3 (Marinefliegergeschwader 3) and Naval Air Wing 5 (Marinefliegergeschwader 5), equipped with the P-3C Orion, Dornier Do 228NG, Mk88A Sea Lynx and Mk41 Sea King.

No. 11 Squadron RAAF: No. 11 Squadron is a Royal Australian Air Force (RAAF) maritime patrol squadron based at RAAF Base Edinburgh.  It was formed in 1939 and has seen active service in World War II, East Timor, the War on Terrorism and the 2003 Gulf War.  The squadron became known to the public through its participation in the Great Southern Ocean rescues of wrecked sailors, such as Tony Bullimore and Isabelle Autissier.

Atauro Island: Atauro Island (Tetum: "Pulau Atauro" or "Ata'uro", Portuguese: "Ilha de Ataúro" , Indonesian: "Pulau Kambing" ) is a small island situated 25 km north of Dili, East Timor, on the extinct Wetar segment of the volcanic Inner Banda Arc, between the Indonesian islands of Alor and Wetar.  Politically it comprises one of the subdistricts of the Dili District of East Timor.  It is about 25 km long and 9 km wide, about 105 km in area, and is inhabited by about 8,000 people.  The nearest island is the Indonesian island of Liran, 12 km to the northeast.

Wrzosówka, Świętokrzyskie Voivodeship: Wrzosówka is a village in the administrative district of Gmina Małogoszcz, within Jędrzejów County, Świętokrzyskie Voivodeship, in south-central Poland.  It lies approximately 5 km north of Małogoszcz, 25 km north of Jędrzejów, and 25 km west of the regional capital Kielce.

RAAF Base Edinburgh: RAAF Base Edinburgh (ICAO: YPED) is a Royal Australian Air Force (RAAF) military airbase located in Edinburgh, 25 km north of the centre of Adelaide, South Australia, in Australia

Supporting paragraphs: No. 11 Squadron RAAF RAAF Base Edinburgh
Answer: Adelaide