In this task, you are given a set of context paragraph and some supporting facts to answer a question. Your task is to generate answer for given question based on set of context paragraphs and supporting facts.

Ex Input:
Context_1 : Mortal Sin were an Australian thrash metal band that formed in 1985 and existed over four distinct periods until 2012. The band released five albums and were the first local thrash metal band to tour internationally. According to Australian musicologist, Ian McFarlane, they were one of "two leading lights... [of] a small, but fervent underground thrash/speed metal scene." Context_2 : Kronik is a compilation album released by the Canadian thrash metal/progressive metal band Voivod in 1998 on Hypnotic Records. It is their eleventh release altogether, featuring remixes, previously unreleased songs, and live recordings. The album features the track "Ion", which is played during the opening credits of the "Heavy Metal 2000" movie. It was re-released in 2004 by Candlelight Records. Context_3 : Annihilator is a Canadian thrash metal band founded in 1984 by vocalist, guitarist, bassist, songwriter, engineer, producer, mixer and mastering engineer Jeff Waters and former vocalist John Bates. They are the highest-selling heavy metal group from Canada in Canadian history, having sold more than three million albums worldwide, although most of their sales have been generated outside of the band's home country. Along with Sacrifice, Voivod and Razor, Annihilator is credited as one of the "Big 4" of Canadian thrash metal. Context_4 : Voivod is a Canadian thrash metal band from Jonquiere, Quebec. The band consists of Denis "Snake" Belanger (vocals), Daniel "Chewy" Mongrain (guitar), Dominique "Rocky" Laroche (bass) and Michel "Away" Langevin (drums). Their musical style has changed several times since the band's origin in the early 1980s. Starting out as a speed metal band, Voivod have added a mix of progressive metal and thrash metal to create their own unique metal style, and they are credited as one of the "big four" Canadian thrash metal bands, along with Sacrifice, Razor, and Annihilator. Context_5 : Sacrifice is a Canadian thrash metal band from Toronto, Ontario. The band was formed by guitarists Rob Urbinati and Joe Rico in 1983. Sacrifice played a prominent role in the 1980s scene in Toronto, and along with Voivod, Razor and Annihilator, they are considered one of the "Big 4" of Canadian thrash metal. The band released four studio albums before parting ways in 1993. After coming back together to play a reunion concert in 2006, they released their fifth studio album "The Ones I Condemn" on Brazilian label Marquee Records in 2009. Although the band faced numerous lineup changes, especially in their early days, founding guitarists Urbinati, Rico and bassist Scott Watts recorded every studio album and demo and drummer Gus Pynn on everything but the "Apocalypse Inside" demo and CD. Context_6 : Deliverance is the 1989 self-titled debut album by the Christian speed/thrash metal band Deliverance. The original Intense Records pressing is now considered a valuable collectable. It was reissued, minus 2 songs in 1998 on KMG Records as a two-disc set along with the 1990 album "Weapons of Our Warfare". It was officially re-released late 2008 with 2 bonus tracks on Retroactive Records. The album was ranked at No. 44 on "Metal Hammer"' s top 50 thrash metal albums of all-time list. In 2010, "HM Magazine" listed "Deliverance" No. 31 on its Top 100 Christian Rock Albums of All Time list stating that "'If You Will' into 'The Call' is almost as good as metal gets (-Doug Van Pelt)" and that "this record would forever change and impact me and the Christian metal music scene as we knew it!"(-Bill Balford). Heaven's Metal fanzine ranked it No. 3 on its Top 100 Christian metal albums of all-time list. About.com writer Dan Marsicano wrote "Metal with a religious concept is not for everybody, and Deliverance doesn't try to pander to the secular crowd. So, if you don't mind a little preaching, their music is straight-to-the-gut thrash metal at a time where the genre was getting more expansive with its themes and sound. For giving Christian metal a thrash hero to rally behind, Deliverance gets the nod for this week's Retro Recommendation." Context_7 : Tales from the Grave in Space is the third studio album by Irish thrash metal band Gama Bomb, and one of the first albums ever to be released as a free download by a signed band. In a partnership between the band and record label Earache Records, the album was available for free download from 5 November 2009, hosted by RapidShare. The album was physically released on January 25 in the UK and Europe and the US on March 8. Context_8 : Total Annihilation is a compilation album by the band Annihilator, it was released in 2010 as a free download. Context_9 : Forbidden was a thrash metal band from the San Francisco Bay Area. Formed in 1985 as Forbidden Evil, the group was founded by Russ Anderson and Craig Locicero, who were both ever-present members. Since their formation, Forbidden have broken up and reformed twice with numerous line-up changes. The most recent line-up of the band comprised Anderson (vocals), Locicero (guitar), Matt Camacho (bass), Steve Smyth (guitar) and Sasha Horn (drums). Along with Death Angel, Vio-lence, Defiance, Testament and Exodus (the latter of the two had featured original Forbidden drummer Paul Bostaph), they were one of the most successful Bay Area thrash metal bands and earned a loyal fanbase in the underground music community and critical acclaim, with their debut album "Forbidden Evil" (1988) regarded by critics as a classic thrash metal album and the follow-up, "Twisted Into Form", as something of a masterpiece within the tech-thrash genre. Their earlier style was technical thrash metal, but the band later experimented with alternative and groove metal elements on their fourth album "Green" (1997). Context_10 : U.S.C.H! is the third studio album by the Finnish industrial metal band Turmion Katilot. Released June 11, 2008 for free download on Turmion Katilot's record label Raha Records, it consists of 10 songs. The first single from the album, Mina Maaraan, was released for free download on Raha Records' website (now replaced with the free download of U.S.C.H!) on May 21, 2008. The band have announced a presale of the physical album, to be released on May 13, 2009. fact_1 : Total Annihilation is a compilation album by the band Annihilator, it was released in 2010 as a free download. fact_2 : Annihilator is a Canadian thrash metal band founded in 1984 by vocalist, guitarist, bassist, songwriter, engineer, producer, mixer and mastering engineer Jeff Waters and former vocalist John Bates. Question: What Canadian thrash metal band released a compilation album as a free download in 2010?

Ex Output:
Annihilator

Ex Input:
Context_1 : Prudhoe Bay Oil Field is a large oil field on Alaska's North Slope. It is the largest oil field in both the United States and in North America, covering 213543 acre and originally containing approximately 25 Goilbbl of oil. The amount of recoverable oil in the field is more than double that of the next largest field in the United States, the East Texas oil field. The field is operated by BP; partners are ExxonMobil and ConocoPhillips Alaska. Context_2 : The Kern River Oil Field is a large oil field in Kern County in the San Joaquin Valley of California, north-northeast of Bakersfield in the lower Sierra foothills. Yielding a cumulative production of close to 2 Goilbbl of oil by the end of 2006, it is the third largest oil field in California, after the Midway-Sunset Oil Field and the Wilmington Oil Field, and the fifth largest in the United States. Its estimated remaining reserves, as of the end of 2006, were around 476 Moilbbl , the second largest in the state. It had 9,183 active wells, the second highest in the state. The principal operator on the field is Chevron Corporation Context_3 : Cantarell Field or Cantarell Complex is an aging supergiant oil field in Mexico. It was discovered in 1976 after oil stains were noticed by a fisherman, Rudesindo Cantarell Jimenez, in 1972. It was placed on nitrogen injection in 2000, and production peaked at 2.1 Moilbbl/d in 2003. In terms of cumulative production to date, it is by far the largest oil field in Mexico, and one of the largest in the world. However, production has declined since 2003, falling to 408000 oilbbl/d in April 2012, making it Mexico's second most productive oil field after Ku-Maloob-Zaap. Context_4 : The Tarn oil field is an oil field in North Slope Borough, Alaska, United States. It is adjacent to the Kuparuk Oil Field, Alaska's second largest oil field. Context_5 : The Round Mountain Oil Field is a large oil and gas field in the foothills of the Sierra Nevada, about 10 mi northeast of Bakersfield, California, United States. It is east of the giant Kern River Oil Field, one of the largest in the United States, and also close to the Mount Poso Oil Field and Kern Front Oil Field. With a cumulative total recovery of more than 110 Moilbbl of oil, it is the 48th largest oil field in California, but remains relatively productive with still about ten percent of its reserves remaining in the ground, according to the California Department of Oil, Gas, and Geothermal Resources (DOGGR). Context_6 : Carabobo is an oil field located in Venezuela's Orinoco Belt. As one of the world's largest accumulations of recoverable oil, the recent discoveries in the Orinoco Belt have led to Venezuela holding the world's largest recoverable reserves in the world, surpassing Saudi Arabia in July 2010. The Carabobo oil field is majority owned by Venezuela's national oil company, Petroleos de Venezuela SA (PDVSA). Owning the majority of the Orinoco Belt, and its estimated 1.18 trillion barrels of oil in place, PDVSA is now the fourth largest oil company in the world. The field is well known for its extra Heavy crude oils, having an average specific gravity between 4 and 16 API. The Orinoco Belt holds 90% of the world's extra heavy crude oils, estimated at 256 billion recoverable barrels. While production is in its early development, the Carabobo field is expected to produce 400,000 barrels of oil per day. Context_7 : Dresser Industries was a multinational corporation headquartered in Dallas, Texas, United States, which provided a wide range of technology, products, and services used for developing energy and natural resources. In 1998, Dresser merged with its main rival Halliburton, Halliburton sold many of former Dresser non "oil patch" divisions, retaining the M W Kellogg Engineering and Construction Company and the Dresser oil-patch products and services that complemented Halliburton's energy and natural resource businesses. In 2001 Halliburton sold five separate, but somewhat related former Dresser non "oil patch" divisions, to an investment banking firm. Those five operations later took the name "Dresser Inc." In October 2010, Dresser Inc., was acquired by General Electric. It is headquartered in Addison, Texas. Context_8 : The North Belridge Oil Field is a large oil field along California State Route 33 in the northwestern portion of Kern County, California, about 45 miles west of Bakersfield. It is contiguous with the larger South Belridge Oil Field to the southeast, in a region of highly productive and mature fields. Discovered in 1912, it has had a cumulative production of 136553000 oilbbl of oil, and retains 27443000 oilbbl in reserve, as of the end of 2006, making it the 40th largest oil field in the state. Context_9 : The South Mountain Oil Field is a large and productive oil field in Ventura County, California, in the United States, in and adjacent to the city of Santa Paula. Discovered in 1916, and having a cumulative production of over 158 Moilbbl of oil, it is the 37th largest oil field in California and the second largest in Ventura County (after the Ventura field). As of the beginning of 2009, it retains 316 active wells, and has an estimated 1.4 Moilbbl of oil remaining recoverable with current technology. Vintage Production, a subsidiary of Occidental Petroleum, was the largest operator as of 2009. Context_10 : The Halliburton Company, an American multinational corporation. One of the world's largest oil field service companies, it has operations in more than 70 countries. It owns hundreds of subsidiaries, affiliates, branches, brands, and divisions worldwide and employs approximately 50,000 people. fact_1 : Dresser Industries was a multinational corporation headquartered in Dallas, Texas, United States, which provided a wide range of technology, products, and services used for developing energy and natural resources. fact_2 : In 1998, Dresser merged with its main rival Halliburton, Halliburton sold many of former Dresser non "oil patch" divisions, retaining the M W Kellogg Engineering and Construction Company and the Dresser oil-patch products and services that complemented Halliburton's energy and natural resource businesses. fact_3 : The Halliburton Company, an American multinational corporation. fact_4 : One of the world's largest oil field service companies, it has operations in more than 70 countries. Question: Dresser Industries, merged in 1998 with its main rival, what American multinational corporation, that is one of the world's largest oil field service companies?

Ex Output:
Halliburton

Ex Input:
Context_1 : The Arab Spring, (Arabic: "ar-Rabi al-Arabi") also referred to as Arab revolutions (Arabic: "at-'awrat al-arabiyyah"), was a revolutionary wave of both violent and non-violent demonstrations, protests, riots, coups and civil wars in North Africa and the Middle East that began on 17 December 2010 in Tunisia with the Tunisian Revolution. Context_2 : "Saraya Aqaba" is a Jordanian private shareholding company, whose founding shareholders include Saraya Jordan, Jordan's Social Security Corporation, Aqaba Development Corporation, and Arab Bank plc. Saraya Aqaba will implement the US$1 billion "Saraya Aqaba Project", a tourism and leisure destination, with a mixed-use themed development. Situated on the northern tip of the Gulf of Aqaba, the construction of the Saraya Aqaba Project and its man-made lagoon will add approximately 1.5km of beachfront to the city of Aqaba. Context_3 : The Revolutions of 1820 were a revolutionary wave in Europe. It included revolutions in Spain, Portugal, Russia, and Italy for constitutional monarchies, and for independence from Ottoman rule in Greece. Unlike the revolutionary wave in the 1830s, these tended to take place in the peripheries of Europe. Context_4 : The largest projects in the Philippine Economy includes both megaprojects, costing over $1 billion, and other large investment projects, typically costing between $10 million and $1 billion. Projects with investments below $10 million also may be included here, either as parts of larger projects, or in case of major international significance and media coverage. In case of projects involving new vehicle models, the cost of development is taken into account as well as the cost of production. Context_5 : Privatizations in Morocco were initiated by the Moroccan government in the early 1990s, following a policy of privatization of certain economic sectors which used to be in the hands of the government. Privatizations started in earnest in 1993, and advanced at a steady pace, averaging one sale of a public company per month. Raising more than US $1 billion in revenue plus investment commitments of another US $260 million, by the end of that year. The number of partly or fully privatized companies in Morocco between 1993 and 2005 reached 66 earning overall MAD 75.5 billion. The various industries affected include airlines, telecommunications, large industrial projects, and tourism. In the agricultural sector, the government plans to sell off agricultural lands currently managed by state farms. Context_6 : The Vineyard Beverly Hills is a 157 acre undeveloped property in Beverly Hills, California reportedly worth $1 billion. One of the owners is Victorino Noval. The property was offered via a website for not under $1 billion and taken off the market in 2015. In 1997, Mark R. Hughes, the founder of Herbalife, bought the property for $8.5 million from a member of the Shah of Iran's family; since then it has gone through a number of owners, following a complex lawsuit after Hughes' death. Context_7 : Midwest Federal Savings and Loan was an American bank headquartered in Minneapolis, Minnesota. Starting in the mid-1960s, its headquarters were located at 801 Nicollet Mall in what is now called McGladrey Plaza. Midwest Federal was in business for ninety-nine years until its failure in 1989. Its collapse was due mostly to bad real estate loans. On April 22, 1991 the "St. Paul Pioneer Press" called the bank's failure the "largest financial disaster in Minnesota history" and was part of the savings and loan crisis of the 1980s. Midwest Federal had assets of $3.5 billion, was liquidated by the Government at a cost of $1 billion to taxpayers. Midwest was $1 billion in debt when it was seized by regulators in February 1989. Context_8 : Arthur James Edward Child, {'1': ", '2': ", '3': ", '4': "} (May 19, 1910 July 30, 1996) was a Canadian businessman and former chairman and chief executive officer of Burns Foods Limited of Calgary. Arthur James Edward Child and his business partner Ron Jackson acquired the food processing and distribution company in a leveraged management buyout in 1986. With sales in excess of $1 billion, Burns Foods was involved in meat processing, dairy, food warehousing and distribution, and vegetable processing businesses. Over a 12-year period, Arthur James Edward Child and his management team built Burns Foods into a leading Canadian food company with over $1 billion in annual sales. Beginning in 1995, a majority of the Burns Foods' subsidiaries were sold generating an exceptional return to the shareholders. Context_9 : The Longaberger Company is an American manufacturer and distributor of handcrafted maple wood baskets and other home and lifestyle products. It was one of the primary employers in the area near Dresden, Ohio with more than 8,200 employees and 1 billion dollars in sales. Started in Dresden, the company is now headquartered in Newark, Ohio. A family-owned and operated business, the Longaberger Company was started by Dave Longaberger in 1973, and was taken over in 2013 by CVSL, Inc. It is currently led by John Rochon Jr, the son of the John P. Rochon, founder and chairman of JRJR Networks and Richmont Holdings. There are currently fewer than 75 full-time and part-time employees. Approximately 30 of those still make baskets. A combination of a recession and changing tastes in home decor combined to send sales, which peaked in 2000 at $1 billion, to about $100 million in 2012. Context_10 : Tourism is one of the most important sectors in Jordan's economy. In 2010, over 8 million tourists from various countries visited Jordan, with tourist receipts amounting to about 3.5 billion dollars. An additional $1 billion was earned through medical tourism to the kingdom. In 2011, Jordanian tourism lost $1 billion due to the political instability across the region. fact_1 : In 2011, Jordanian tourism lost $1 billion due to the political instability across the region. fact_2 : The Arab Spring, (Arabic: "ar-Rabi al-Arabi") also referred to as Arab revolutions (Arabic: "at-'awrat al-arabiyyah"), was a revolutionary wave of both violent and non-violent demonstrations, protests, riots, coups and civil wars in North Africa and the Middle East that began on 17 December 2010 in Tunisia with the Tunisian Revolution. Question: When did the revolutionary wave which made Jordanian tourism lost $1 billion in 2011 began

Ex Output:
17 December 2010