Question: what is the area code for the state in which Submillimeter Array is located?

full_context: Document 1: Area codes 208 and 986: Area codes 208 and 986 are the North American telephone area codes for all of Idaho. 208 is the main area code, and is one of the 86 original area codes created in 1947. It was Idaho's sole area code until 2017, when 986 was added as an overlay for the entire state.
Document 2: Dobsonian telescope: A Dobsonian telescope is an altazimuth-mounted Newtonian telescope design popularized by John Dobson in 1965 and credited with vastly increasing the size of telescopes available to amateur astronomers. Dobson's telescopes featured a simplified mechanical design that was easy to manufacture from readily available components to create a large, portable, low-cost telescope. The design is optimized for observing faint, deep-sky objects such as nebulae and galaxies. This type of observation requires a large objective diameter (i.e. light-gathering power) of relatively short focal length and portability for travel to less light-polluted locations.
Document 3: Wake Island: With the annexation of Hawaii in 1898 and the seizure of Guam and the Philippines during the Spanish -- American War that same year, the United States began to consider unclaimed and uninhabited Wake Island, located approximately halfway between Honolulu and Manila, as a good location for a telegraph cable station and coaling station for refueling warships of the rapidly expanding United States Navy and passing merchant and passenger steamships. On July 4, 1898, United States Army Brigadier General Francis V. Greene of the 2nd Brigade, Philippine Expeditionary Force, of the Eighth Army Corps, stopped at Wake Island and raised the American flag while en route to the Philippines on the steamship liner SS China.
Document 4: Area code 808: The 808 telephone area code covers the inhabited, developed and uninhabited areas of the Hawaiian Islands out to Midway Island and Wake Island. 808 was issued as Hawaii's area code in 1957, not long before its statehood in August of 1959.
Document 5: Area codes 508 and 774: Area codes 508 and 774 are North American Numbering Plan (NANP) telephone area codes for the U.S. state of Massachusetts. This service area currently includes south - central and most of southeastern Massachusetts (LATA code 128). It includes Worcester, Outer south & southwest Greater Boston (such as the MetroWest region), as well as Fall River, New Bedford, Cape Cod, Martha's Vineyard, and Nantucket.
Document 6: Telephone numbers in Hong Kong: Telephone numbers in Hong Kong are mostly eight - digit. Fixed land line numbers start with 2 or 3, Mobile (cellular) phone numbers with 5, 6 or 9, pager numbers with 7 and forwarding service with 8. Since the end of 1989, there have been no area codes within Hong Kong.
Document 7: Submillimeter Array: The Submillimeter Array (SMA) consists of eight diameter radio telescopes arranged as an interferometer for submillimeter wavelength observations. It is the first purpose-built submillimeter interferometer, constructed after successful interferometry experiments using the pre-existing James Clerk Maxwell Telescope and Caltech Submillimeter Observatory as an interferometer. All three of these observatories are located at Mauna Kea Observatory on Mauna Kea, Hawaii, and can be operated together as a ten element interferometer in the 230 and 345 GHz bands (eSMA, for extended Submillimeter Array). The baseline lengths presently in use range from , and up to for eSMA operations. The radio frequencies accessible to this telescope range from which includes rotational transitions of dozens of molecular species as well as continuum emission from interstellar dust grains. Although the array is capable of operating both day and night, most of the observations take place at nighttime when the atmospheric phase stability is best.
Document 8: Hawaii: The Kingdom of Hawai ʻi was sovereign from 1810 until 1893 when the monarchy was overthrown by resident American and European capitalists and landholders. Hawaii was an independent republic from 1894 until August 12, 1898, when it officially became a territory of the United States. Hawaii was admitted as a U.S. state on August 21, 1959.
Document 9: New Delhi: Jantar Mantar located in Connaught Place was built by Maharaja Jai Singh II of Jaipur. It consists of 13 architectural astronomy instruments. The primary purpose of the observatory was to compile astronomical tables, and to predict the times and movements of the sun, moon and planets.
Document 10: Kunlun Dark Universe Survey Telescope: The Kunlun Dark Universe Survey Telescope, also known as KDUST, is a planned large survey telescope to be installed at the Chinese Antarctic Kunlun Station located at Dome A ice plateau in Antarctica in the second half of the 2010s. It is intended to take advantage of the exceptional observation conditions due to low temperature, clean air quality and low disturbances which reduce background noises for infrared observations.
Document 11: Hawaiian Islands: The Hawaiian Islands (Hawaiian: Mokupuni o Hawai'i) are an archipelago of eight major islands, several atolls, numerous smaller islets, and seamounts in the North Pacific Ocean, extending some 1,500 miles (2,400 kilometers) from the island of Hawai ʻi in the south to northernmost Kure Atoll. Formerly the group was known to Europeans and Americans as the ``Sandwich Islands '', a name chosen by James Cook in honor of the then First Lord of the Admiralty John Montagu, 4th Earl of Sandwich. The contemporary name is derived from the name of the largest island, Hawaii Island.
Document 12: Giant Metrewave Radio Telescope: The Giant Metrewave Radio Telescope (GMRT), located near Pune (Narayangaon) in India, is an array of thirty fully steerable parabolic radio telescopes of 45 metre diameter, observing at metre wavelengths. It is operated by the National Centre for Radio Astrophysics, a part of the Tata Institute of Fundamental Research, Mumbai. At the time it was built, it was the world's largest interferometric array offering a baseline of up to 25 kilometres (16 mi).
Document 13: Saint Helena: A satellite ground station with a 7.6-metre (25 ft) satellite dish installed in 1989 at The Briars is the only international connection providing satellite links through Intelsat 707 to Ascension island and the United Kingdom. Since all international telephone and internet communications are relying on this single satellite link both internet and telephone service are subject to sun outages.
Document 14: UK Schmidt Telescope: The UK Schmidt Telescope (UKST) is a 1.24 metre Schmidt telescope operated by the Australian Astronomical Observatory (formerly the Anglo-Australian Observatory); it is located adjacent to the 3.9 metre Anglo-Australian Telescope at Siding Spring Observatory, Australia. It is very similar to the Samuel Oschin telescope in California. The telescope can detect objects down to magnitude 21 after an hour of exposure on photographic plates.
Document 15: Hawaii: Hawaii (English: / həˈwaɪ. i, - ji, - ʔi / (listen) hə - WY - (y) ee; Hawaiian: Hawai ʻi (həˈvɐjʔi)) is the 50th and most recent state to have joined the United States of America, having received statehood on August 21, 1959. Hawaii is the only U.S. state located in Oceania and the only one composed entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean. Hawaii is the only U.S. state located outside North America.
ground_truth: 808
sub_queries: In which state is Submillimeter Array located? Answer: Hawaii
what is the area code for the state of Hawaii Answer: 808