Ou Chrov (Khmer: ស្រុកអូរជ្រៅ , "Deep Ditch") is a district ("srok") in the west of Banteay Meanchey Province in north-western Cambodia.
 The border town of Poipet is located within the district.
 Poipet is the district capital and is located around 48.5 kilometres due west of the provincial capital of Sisophon by road.
 Ou Chrov District is one of the western-most districts of Banteay Meanchey.
 The district borders on Thailand and Poipet contains a popular international border crossing which is home to numerous casinos.
Chengguan District is an administrative district of Lanzhou, the capital of China's Gansu province.
 It is one of the five districts of Lanzhou.
 It is located mostly on the southern side of the Yellow River, and includes the downtown Lanzhou.
 Both the Gansu provincial government offices and those of the Lanzhou prefecture-level city are located within the district.
 The Lanzhou Railway Station is also located in this district.
Hilliard is a township in the Canadian province of Ontario, located within the Timiskaming District.
 Its main community is Hilliardton, located along Secondary Highway 569.
 The smaller communities of Couttsville and Whitewood Grove are also located within the township.
Washir (Vashir) is a village located at at 1,155 m altitude in a hilly area.
 It is the district center of Washir District, Helmand Province, Afghanistan.
Hamlet of Warrensburgh Historic District is a national historic district located at Warrensburg, Warren County, New York.
 It includes 351 contributing buildings, three contributing sites, and five contributing structures.
 It encompasses the historic commercial core on the north side of the Schroon River and historic industrial core on the south side of the river of the hamlet of Warrensburgh.
 It includes more high styled residences and notable civic and religious properties on the north side and vernacular residences on the south side.
 Notable commercial buildings include the Woodward Block (ca. 1860), Wills Block (ca. 1865), bank building at 138 Main Street (ca. 1927), and the former Sturdevan's Bakery (ca. 1840).
 Three historic churches within the district are the Church of the Holy Cross (1864), First Methodist Church (1904), and United Presbyterian Church (1840).
 Civic buildings located within the district are the Richards Library (1900) and Warrensburgh Central School (1942).
 In addition, the Floyd Bennett Park and Bandstand (1930–31), named for Warrensburg native Floyd Bennett, is within the district.
 The St. Cecelia's Cemetery and Warrensburgh Cemetery are also within the district boundaries.
 Located within the district is the separately listed Merrill MaGee House and Warrensburg Mills Historic District.
Oro Province, formerly (and officially still) Northern Province, is a coastal province of Papua New Guinea.
 The provincial capital is Popondetta.
 The province covers 22,800 km, and has 176,206 inhabitants (2011 census).
 The province shares land borders with Morobe Province to the northwest, Central Province to the west and south, and Milne Bay Province to the southeast.
 The province is located within the Papuan Peninsula.
Camp Leatherneck is a 1,600 acre Afghan Armed Forces base in Helmand Province, Afghanistan.
 The site is mostly in Washir District and is conjoined with Camp Bastion, the main British military base in Afghanistan.
Washir (also spelt Washer or Washar) is a district in the west of Helmand Province, Afghanistan.
 Its population was reported in 2012 as 15,200, which all belong to the Pashtun ethnic group and are believed to be of Noorzai tribe.
 The district centre is the village of Washir.
 The district of Washer borders Farah province to the north and is 80 kilometres south of Lashkar Gah.
Helmand ( ; Pashto/Dari: هلمند), also known as Hillmand, and, in ancient times, as Hermand and Hethumand is one of the 34 provinces of Afghanistan, in the south of the country.
 It is the largest province by area, covering 58,584 km2 area.
 The province contains 13 districts, encompassing over 1,000 villages, and roughly 879,500 settled people.
 Lashkar Gah serves as the provincial capital.
Central Province is a province in Papua New Guinea located on the southern coast of the country.
 It has a population of 237,016 (2010 census) people and is 29998 km2 in size.
 The seat of government of Central Province, which is located within the National Capital District outside the province, is the Port Moresby suburb of Konedobu.
 On 9 October 2007, the Central Province government announced plans to build a new provincial capital city at Bautama, which lies within Central Province near Port Moresby, although there has been little progress in constructing it.

Question: What is the capital of the province which the Washir District is located within?
Answer: Lashkar Gah