Question: When did the neighbor of the country with the best internet in the world conduct its first nuclear test?

full_context: Document 1: List of states with nuclear weapons: Country Warheads (Deployed / Total) Date of first test Test site of first test CTBT status Delivery methods Number of tests The five nuclear - weapon states under the NPT United States 1,800 / 6,800 16 July 1945 (``Trinity '') Alamogordo, New Mexico Signatory Nuclear triad 1,054 Russia 1,950 / 7,000 29 August 1949 (`` RDS - 1'') Semipalatinsk, Kazakhstan Ratifier Nuclear triad 715 United Kingdom 120 / 215 3 October 1952 (``Hurricane '') Monte Bello Islands, Australia Ratifier Sea - based 45 France 280 / 300 13 February 1960 (`` Gerboise Bleue'') Sahara, French Algeria Ratifier Sea - and air - based 210 China? / 270 16 October 1964 (``596 '') Lop Nur, Xinjiang Signatory Suspected nuclear triad. 45 Non-NPT nuclear powers India 0 / 110 -- 120 18 May 1974 (`` Smiling Buddha'') Pokhran, Rajasthan Non-signatory Nuclear triad 6 Pakistan 0 / 120 -- 130 28 May 1998 (``Chagai - I '') Ras Koh Hills, Balochistan Non-signatory Land and air - based. 6 North Korea 0 /? 9 October 2006 Kilju, North Hamgyong Non-signatory Suspected land and sea - based. 6 Undeclared nuclear powers Israel n.a. / est. 60 -- 400 1960 -- 1979 incl. suspected Vela Incident Signatory Suspected nuclear triad.
Document 2: List of countries by Internet connection speeds: Rank Country / Territory Avg. connection speed (Mb / s) Relative speed - Global 5.6 5.6 South Korea 26.7 26.7 Sweden 19.1 19.1 Norway 18.8 18.8 Japan 17.4 17.4 5 Netherlands 17.0 17 6 Hong Kong 16.8 16.8 7 Latvia 16.7 16.7 8 Switzerland 16.7 16.7 9 Finland 16.6 16.6 10 Denmark 16.1 16.1
Document 3: North Korea and weapons of mass destruction: North Korea has a military nuclear weapons program and also has a significant quantity of chemical and biological weapons. As of 2003, North Korea is no longer a party to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). The country has come under sanctions after conducting a number of nuclear tests, beginning in 2006.
Document 4: List of countries by Internet connection speeds: Rank Country / Territory Avg. Peak Connection speed (Mb / s) Relative speed Singapore 184.5 184.5 Hong Kong 129.5 129.5 South Korea 121 121 Qatar 107.9 107.9 5 Thailand 106.6 106.6 6 Israel 99.1 99.1 7 Sweden 95.3 95.3 8 Romania 95 95 9 Taiwan 94.7 94.7 10 Japan 94.5 94.5
Document 5: Nuclear weapons testing: Underground tests in the United States continued until 1992 (its last nuclear test), the Soviet Union until 1990, the United Kingdom until 1991, and both China and France until 1996. In signing the Comprehensive Nuclear - Test - Ban Treaty in 1996, these states have pledged to discontinue all nuclear testing; the treaty has not yet entered into force because of failure to be ratified by eight countries. Non-signatories India and Pakistan last tested nuclear weapons in 1998. North Korea conducted nuclear tests in 2006, 2009, 2013, 2016, and 2017. The most recent confirmed nuclear test occurred in September 2017 in North Korea.
Document 6: Geography of Japan: Japan is an island nation in East Asia comprising a volcanic archipelago extending along the continent's Pacific coast. It lies between 24 ° to 46 ° north latitude and from 123 ° to 146 ° east longitude. Japan is southeast of the Russian Far East, separated by the Sea of Okhotsk; slightly east of the Korean Peninsula, separated by the Sea of Japan; and east - northeast of China and Taiwan, separated by the East China Sea. The closest neighboring country to Japan is Russia.
Document 7: Geography of South Korea: South Korea is located in East Asia, on the southern half of the Korean Peninsula jutting out from the far east of the Asian land mass. The only country with a land border to South Korea is North Korea, lying to the north with 238 kilometres (148 mi) of border running along the Korean Demilitarized Zone. South Korea is mostly surrounded by water and has 2,413 kilometres (1,499 mi) of coast line along three seas; to the west is the Yellow Sea (known in Korea as West Sea), to the south is the East China Sea, and to the east is the Sea of Japan (known in Korea as East Sea). Geographically, South Korea's land mass is approximately 100,032 square kilometres (38,623 sq mi). 290 square kilometres (110 sq mi) of South Korea are occupied by water. The approximate coordinates are 37 ° North, 127 ° 30 East. Notable islands include Jeju Island (Jejudo), Ulleung Island (Ulleungdo), and Liancourt Rocks (Dokdo, known in Japan as Takeshima).
Document 8: South Korea: The country, including all its islands, lies between latitudes 33 ° and 39 ° N, and longitudes 124 ° and 130 ° E. Its total area is 100,032 square kilometres (38,622.57 sq mi).
Document 9: Geography of Vietnam: Vietnam is located on the eastern margin of the Indochinese peninsula and occupies about 331,211.6 square kilometers, of which about 25% was under cultivation in 1987. It borders the Gulf of Thailand, Gulf of Tonkin, and Pacific Sea, alongside China, Laos, and Cambodia. The S - shaped country has a north - to - south distance of 1,650 kilometers and is about 50 kilometers wide at the narrowest point. With a coastline of 3,260 kilometers, excluding islands, Vietnam claims 12 nautical miles (22.2 km; 13.8 mi) as the limit of its territorial waters, an additional 12 nautical miles (22.2 km; 13.8 mi) as a contiguous customs and security zone, and 200 nautical miles (370.4 km; 230.2 mi) as an exclusive economic zone.
Document 10: Communications in Somalia: As of 2009, dial up, wireless and satellite services were available. Dial up internet services in Somalia were among the fastest growing on the continent, with an annual landline growth rate of over 12.5%. The increase in usage was largely due to innovative policy initiatives adopted by the various Somali telecom operators, including free local in-town calls, a flat rate of $10 per month for unlimited calls, a low charge of $0.005 per minute for Internet connections, and a one-time connection fee of $50. Global Internet Company, a firm jointly owned by the major Somali telecommunication networks Hormuud Telecom, Telcom Somalia and Nationlink, was the country's largest ISP. It was at the time the only provider of dial up services in Somalia's south-central regions. In the northern Puntland and Somaliland regions, online networks offered internet dial up services to their own group of subscribers. Among these firms was Golis Telecom Somalia in the northeast and Telesom in the northwest.
Document 11: Greece: Internet cafés that provide net access, office applications and multiplayer gaming are also a common sight in the country, while mobile internet on 3G and 4G- LTE cellphone networks and Wi-Fi connections can be found almost everywhere. 3G/4G mobile internet usage has been on a sharp increase in recent years, with a 340% increase between August 2011 and August 2012. The United Nations International Telecommunication Union ranks Greece among the top 30 countries with a highly developed information and communications infrastructure.
Document 12: Human Development Index: The list below displays the top-ranked country from each year of the Human Development Index. Norway has been ranked the highest twelve times, Canada eight times, followed by Japan which has been ranked highest three times. Iceland has been ranked highest twice.
Document 13: South Korea: South Korea occupies the southern portion of the Korean Peninsula, which extends some 1,100 km (680 mi) from the Asian mainland. This mountainous peninsula is flanked by the Yellow Sea to the west, and the Sea of Japan to the east. Its southern tip lies on the Korea Strait and the East China Sea.
Document 14: List of nuclear weapons tests of North Korea: Nuclear tests Information Country North Korea Test site Punggye - ri Nuclear Test Site, North Korea Period 2006 -- present Number of tests 6 Test type underground Max. yield ~ 140 kt (U.S. intelligence) 160 kt (Revised estimates from Japanese Government) 250 kt (38 North and revised NORSAR estimate)
Document 15: 2006 North Korean nuclear test: The 2006 North Korean nuclear test was the detonation of a nuclear device conducted by North Korea on October 9, 2006.
ground_truth: October 9, 2006
sub_queries: who has the best internet in the world Answer: South Korea
what are the neighboring countries of South Korea Answer: North Korea
when did North Korea conduct its first nuclear test Answer: October 9, 2006