Question: The organization which authorized troops to follow North Korean forces north recognizes how many regions on the continent containing Igor Sacharow-Ross's birthplace?

full_context: Document 1: Military history of the United States: The war started badly for the US and UN. North Korean forces struck massively in the summer of 1950 and nearly drove the outnumbered US and ROK defenders into the sea. However the United Nations intervened, naming Douglas MacArthur commander of its forces, and UN-US-ROK forces held a perimeter around Pusan, gaining time for reinforcement. MacArthur, in a bold but risky move, ordered an amphibious invasion well behind the front lines at Inchon, cutting off and routing the North Koreans and quickly crossing the 38th Parallel into North Korea. As UN forces continued to advance toward the Yalu River on the border with Communist China, the Chinese crossed the Yalu River in October and launched a series of surprise attacks that sent the UN forces reeling back across the 38th Parallel. Truman originally wanted a Rollback strategy to unify Korea; after the Chinese successes he settled for a Containment policy to split the country. MacArthur argued for rollback but was fired by President Harry Truman after disputes over the conduct of the war. Peace negotiations dragged on for two years until President Dwight D. Eisenhower threatened China with nuclear weapons; an armistice was quickly reached with the two Koreas remaining divided at the 38th parallel. North and South Korea are still today in a state of war, having never signed a peace treaty, and American forces remain stationed in South Korea as part of American foreign policy.
Document 2: Korean War: By August, the KPA had pushed back the ROK Army and the Eighth United States Army to the vicinity of Pusan in southeast Korea. In their southward advance, the KPA purged the Republic of Korea's intelligentsia by killing civil servants and intellectuals. On 20 August, General MacArthur warned North Korean leader Kim Il-sung that he was responsible for the KPA's atrocities. By September, the UN Command controlled the Pusan perimeter, enclosing about 10% of Korea, in a line partially defined by the Nakdong River.
Document 3: Tajikistan: In 2009 Tajikistan had 26 airports, 18 of which had paved runways, of which two had runways longer than 3,000 meters. The country's main airport is Dushanbe International Airport which as of April 2015, had regularly scheduled flights to major cities in Russia, Central Asia, as well as Delhi, Dubai, Frankfurt, Istanbul, Kabul, Tehran, and Ürümqi amongst others. There are also international flights, mainly to Russia, from Khujand Airport in the northern part of the country as well as limited international services from Kulob Airport, and Qurghonteppa International Airport. Khorog Airport is a domestic airport and also the only airport in the sparsely populated eastern half of the country.
Document 4: United Nations Regional Groups: the African Group, with 54 member states the Asia - Pacific Group, with 53 member states the Eastern European Group, with 23 member states the Latin American and Caribbean Group (GRULAC), with 33 member states the Western European and Others Group (WEOG), with 28 member states, plus 1 member state (the United States) as an observer state.
Document 5: Ilya Schor: Ilya Schor was born in Złoczów (Galicia), in the Austrian Empire, later Poland, in 1904. He came from a deeply Hasidic family. His father Naftali Schorr was a folk-artist, painting colorfully illustrated store signs for local merchants. Ilya Schor first trained as an apprentice in metalcrafts and engraving before enrolling at the Warsaw Academy of Fine Arts in 1930 where he studied painting. In 1937, he was awarded a grant by the Polish government to study in Paris. He exhibited successfully at the Salon d’Automne in 1938. Ilya Schor and his artist wife Resia Schor immigrated to the United States in December, 1941, from Marseilles, via Lisbon, after fleeing Paris in late May 1940. Ilya Schor and Resia Schor had two daughters, born in New York City: artist and writer Mira Schor (b. 1950) and noted literary scholar and theorist, Naomi Schor (1943–2001).
Document 6: Khabarovsk: Khabarovsk is served by the Khabarovsk Novy Airport with international flights to East Asia, Southeast Asia, European Russia, and Central Asia.
Document 7: Kathmandu: The main international airport serving Kathmandu and thus Nepal is the Tribhuvan International Airport, located about six kilometers (6 km (3.7 mi)) from the city centre. Operated by the Civil Aviation Authority of Nepal it has two terminals, one domestic and one international. At present, about 22 international airlines connect Nepal to other destinations in Europe, Asia and the Middle East, to cities such as Istanbul, Delhi, Kolkata, Singapore, Bangkok, Kuala Lumpur, Dhaka, Islamabad, Paro, Lhasa, Chengdu, and Guangzhou. A recent extension to the international terminal has made the distance to the airplanes shorter and in October 2009 it became possible to fly directly to Kathmandu from Amsterdam with Arkefly. Since 2013, Turkish Airlines connects Istanbul to Kathmandu. Regionally, several Nepali airlines operate from the city, including Agni Air, Buddha Air, Cosmic Air, Nepal Airlines and Yeti Airlines, to other major towns across Nepal.
Document 8: Igor Ternov: Igor Ternov graduated from Faculty of Physics of Moscow State University (MSU) in 1951, where he spent his entire career. Igor Ternov was one of the leading experts in the theory of synchrotron radiation.
Document 9: Korean War: Meanwhile, on 10 October 1950, the 89th Tank Battalion was attached to the 1st Cavalry Division, increasing the armor available for the Northern Offensive. On 15 October, after moderate KPA resistance, the 7th Cavalry Regiment and Charlie Company, 70th Tank Battalion captured Namchonjam city. On 17 October, they flanked rightwards, away from the principal road (to Pyongyang), to capture Hwangju. Two days later, the 1st Cavalry Division captured Pyongyang, the North's capital city, on 19 October 1950. Kim Il Sung and his government temporarily moved its capital to Sinuiju – although as UNC forces approached, the government again moved – this time to Kanggye.
Document 10: Korean War: By 1 October 1950, the UN Command repelled the KPA northwards past the 38th parallel; the ROK Army crossed after them, into North Korea. MacArthur made a statement demanding the KPA's unconditional surrender. Six days later, on 7 October, with UN authorization, the UN Command forces followed the ROK forces northwards. The X Corps landed at Wonsan (in southeastern North Korea) and Riwon (in northeastern North Korea), already captured by ROK forces. The Eighth U.S. Army and the ROK Army drove up western Korea and captured Pyongyang city, the North Korean capital, on 19 October 1950. The 187th Airborne Regimental Combat Team ("Rakkasans") made their first of two combat jumps during the Korean War on 20 October 1950 at Sunchon and Sukchon. The missions of the 187th were to cut the road north going to China, preventing North Korean leaders from escaping from Pyongyang; and to rescue American prisoners of war. At month's end, UN forces held 135,000 KPA prisoners of war. As they neared the Sino-Korean border, the UN forces in the west were divided from those in the east by 50–100 miles of mountainous terrain.
Document 11: World Health Organization: As of 2016, the WHO has 194 member states: all of them Member States of the United Nations except for the Cook Islands and Niue. (A state becomes a full member of WHO by ratifying the treaty known as the Constitution of the World Health Organization.) As of 2013, it also had two associate members, Puerto Rico and Tokelau. Several other countries have been granted observer status. Palestine is an observer as a ``national liberation movement ''recognized by the League of Arab States under United Nations Resolution 3118. The Holy See also attends as an observer, as does the Order of Malta. In 2010, Taiwan was invited under the name of`` Chinese Taipei''.
Document 12: Igor Lazko: Igor Lazko (, ), (b. St Petersburg, 1949), is a Russian classical pianist who has made a distinguished international career as performer, recording artist and teacher of other pianists.
Document 13: Korean Air: Korean Air's international passenger division and related subsidiary cargo division together serve 127 cities in 44 countries, while its domestic division serves 12 destinations. It is among the top 20 airlines in the world in terms of passengers carried and is also the top-ranked international cargo airline. Incheon International Airport serves as Korean Air's international hub. Korean Air also maintains a satellite headquarters campus at Incheon. The majority of Korean Air's pilots, ground staff, and flight attendants are based in Seoul.
Document 14: United Nations Population Fund: The UNFPA supports programs in more than 150 countries, territories and areas spread across four geographic regions: Arab States and Europe, Asia and the Pacific, Latin America and the Caribbean, and sub-Saharan Africa. Around three quarters of the staff work in the field. It is a member of the United Nations Development Group and part of its Executive Committee.
Document 15: Igor Sacharow-Ross: Igor Sacharow-Ross (born 1947 in Khabarovsk) is a German-Russian visual artist who works in Cologne and Munich. He is considered a pioneer in the realm of interdisciplinary art.
ground_truth: 53 member states
sub_queries: Igor Sacharow-Ross >> place of birth Answer: Khabarovsk
What continent is Khabarovsk found on? Answer: Asia
Who authorized giving troops the ability to follow the North Korean forces north? Answer: the UN
the the UN recognises how many regions in #2 Answer: 53 member states