Title: Nizhneangarsk
Content:  Nizhneangarsk (Нижнеанга́рск; Доодо Ангар, Doodo Angar; Доор Ангар, Door Angar) is an urban locality (an urban-type settlement) and the administrative center of Severo-Baykalsky District of the Republic of Buryatia, Russia, located at the northern tip of Lake Baikal, 23 km north of Severobaykalsk. As of the 2010 Census, its population was 5,030.
Title: Nizhneangarsk
Content:  Within the framework of administrative divisions, Nizhneangarsk serves as the administrative center of Severo-Baykalsky District. As an administrative division, the urban-type settlement (inhabited locality) of Nizhneangarsk, together with one rural locality (the settlement of Davsha), is incorporated within Severo-Baykalsky District as Nizhneangarsk Urban-Type Settlement (an administrative division of the district). As a municipal division, Nizhneangarsk Urban-Type Settlement is incorporated within Severo-Baykalsky Municipal District as Nizhneangarsk Urban Settlement.
Title: Nizhneangarsk
Content:  It was founded in 1643 by the Russian explorer Semyon Skorokhod and was originally called Verkhneangarsk (Верхнеанга́рск), after the fort built here by Vasily Kolesnik in 1646. In the 1970s, it was planned to make Nizhneangarsk the headquarters of the western end of the Baikal–Amur Mainline, but the marshy ground made it hard to build large buildings, so the headquarters were moved south to Severobaykalsk.
Title: Nizhneangarsk Airport
Content:  Nizhneangarsk Airport (Аэропорт Нижнеангарск) is an airport in Russia located 4 km northeast of Nizhneangarsk and 26 km northeast of Severobaykalsk. It is located at the northern tip of Lake Baikal. It handles small transport aircraft and has a well-maintained runway.
Title: Angarsk
Content:  Angarsk is a city and the administrative center of Angarsky District of Irkutsk Oblast, Russia, located on the Kitoy River, 51 km from Irkutsk, the administrative center of the oblast. Population:
Title: Nizhneangarsk
Content:  Nizhneangarsk is the location of the Nizhneangarsk Airport, with flights to Ulan-Ude and Irkutsk, however, since Bural ceased operations, no flights are made during the winter. The town is also served by the Baikal–Amur Mainline that connects Nizhneangarsk with Severobaikalsk and Tayshet by railway. Train 076Э connects the town with Moscow and runs every two days.
Title: Nizhneangarsk
Content:  In the last decade, Nizhneangarsk had a rather decrease in its population: 5,019 (2011), 4,963 (2012), 4,885 (2013), 4,822 (2014), 4,781 (2015), 4,710 (2016) and 4,520 (2017).
Title: Angarsk
Content:  Within the framework of administrative divisions, Angarsk serves as the administrative center of Angarsky District, to which it is directly subordinated. As a municipal division, the city of Angarsk and thirteen rural localities of Angarsky District are incorporated as Angarskoye Urban Okrug.
Title: Angarsky District
Content:  Angarsky District (Ангарский райо́н) is an administrative district (raion), one of the thirty-three in Irkutsk Oblast, Russia. As a municipal division, it is incorporated as Angarskoye Urban Okrug. It is located in the southwest of the oblast. The area of the district is 1150 km2. Its administrative center is the city of Angarsk. Population: 11,574 (2002 Census).
Title: Nizhny Ingash
Content:  Nizhny Ingash (Ни́жний Инга́ш) is an urban-type settlement and the administrative center of Nizhneingashsky District, Krasnoyarsk Krai, Russia. Train station on the line Ingashskaya Krasnoyarsk - Taishet. It had population 7460 inhabitants in 2007. The settlement was founded in 1775. Town status was given since 1961.

Question: What is Nizhneangarsk the capital of?
Answer: Severo-Baykalsky District.
Severo-Baikalsky Raion.
Severo-Baikalsky District.
Severo-Baykalsky Raion.