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

Let me give you an example: Context_1 : Charles Edward Ives ( ; October 20, 1874May 19, 1954) was an American modernist composer. He is one of the first American composers of international renown, though his music was largely ignored during his life, and many of his works went unperformed for many years. Over time, he came to be regarded as an "American original". He combined the American popular and church-music traditions of his youth with European art music, and was among the first composers to engage in a systematic program of experimental music, with musical techniques including polytonality, polyrhythm, tone clusters, aleatory elements, and quarter tones, foreshadowing many musical innovations of the 20th century. Context_2 : Daniel Evan Freeman (born 27 April 1959) is an American musicologist who specializes in European art music of the eighteenth century, in particular the musical culture of eighteenth-century Prague and the Bohemian lands. He is also active as a pianist and music editor. Context_3 : Art music (also known as Western classical music, cultivated music, serious music, canonic music, and more flippantly, real music or normal music) is an umbrella term that refers to musical traditions, implying advanced structural and theoretical considerations and a written musical tradition. "Serious" or "cultivated" music are terms frequently used as a contrast for ordinary, everyday music (popular and folk music, also called "vernacular music"). After the 20th century, art music was divided into two extensions: "serious music" and "light music". Context_4 : In the history of European art music, the term "common practice period" refers to the era between the formation and the dissolution of the tonal system. Though there are no exact dates for this phenomenon, most features of the common-practice period persisted from the mid to late baroque period, through the Classical and Romantic periods, or roughly from around 1650 to 1900. While certain prevailing patterns and conventions characterize the music of this period, the time period also saw considerable stylistic evolution. Some conventions evolved during this period that were rarely employed at other times during what may still be labeled "common practice" (for example, Sonata Form). Thus, the dates 16501900 are necessarily nebulous and arbitrary borders that depend on context. The most important unifying feature through this time period concerns a harmonic language to which modern music theorists can apply Roman numeral analysis. Context_5 : The Festival Oude Muziek Utrecht ("Utrecht Early Music Festival") is an annual music festival that showcases and celebrates early European art music. The ten-day festival takes place in the Dutch city of Utrecht, and begins in August. The programme comprises concerts, activities, lectures, exhibitions, and a symposium. Context_6 : Assaf Shelleg (Hebrew: ), is a musicologist and pianist, a senior lecturer of musicology at The Hebrew University of Jerusalem. He was previously the Schusterman Visiting Assistant Professor of Musicology and Jewish Studies in the Department of Religious Studies at the University of Virginia (201114), and had taught prior to that as the visiting Efroymson Scholar in the Jewish, Islamic & Near Eastern Languages and Cultures Department at Washington University in St. Louis (200911). Shelleg specializes in twentieth-century Jewish and Israeli art music and has published in some of the leading journals in both musicology and Israel Studies on topics ranging from the historiography of modern Jewish art music to the theological networks of Israeli art music. Shelleg's book, "Jewish Contiguities and the Soundtrack of Israeli History", appeared in November 2014 with Oxford University Press. The book studies the emergence of modern Jewish art music in central and Western Europe (1910s-1930s) and its translocation to Palestine/Israel (1930s-1970s), exposing the legacies of European antisemitism and religious Judaism in the making of Israeli art music. Moving to consider the dislocation of modern Jewish art music the book examines the paradoxes embedded in a Zionist national culture whose rhetoric negated its pasts, only to mask process of hybridizations enchained by older legacies. "Jewish Contiguities" has won the 2015 Engle Prize for the study of Hebrew Music, and the 2016 Jordan Schnitzer Book Award. Context_7 : Vocal harmony is a style of vocal music in which a consonant note or notes are simultaneously sung as a main melody in a predominantly homophonic texture. Vocal harmonies are used in many subgenres of European art music, including Classical choral music and opera and in the popular styles from many Western cultures ranging from folk songs and musical theater pieces to rock ballads. In the simplest style of vocal harmony, the main vocal melody is supported by a single backup vocal line, either at a pitch which is above or below the main vocal line, often in thirds or sixths which fit in with the chord progression used in the song. In more complex vocal harmony arrangements, different backup singers may sing two or even three other notes at the same time as each of the main melody notes, mostly with consonant, pleasing-sounding thirds, sixths, and fifths (although dissonant notes may be used as short passing notes). Context_8 : David Wallis Reeves (February 14, 1838 March 8, 1900), also known as D. W. Reeves or Wally Reeves, was an American composer, cornetist, and bandleader. He developed the American march style, later made famous by the likes of John Philip Sousa, and his innovations include adding a countermelody to the American march form in 1876. Sousa called Reeves "The Father of Band Music in America", and stated he wished he himself had written Reeves' "Second Regiment Connecticut National Guard March". Charles Ives also borrowed from the "Second Connecticut" on four occasions. Context_9 : "Indian classical music is one of many forms of art music that have their roots in particular regional cultures. For other "classical" and art music traditions, see List of classical and art music traditions." Context_10 : Progressive music is music that subverts genre and expands stylistic boundaries outwards. Rooted in the idea of a cultural alternative, musical progressiveness embodies a continuous move between explicit and implicit references to genres and strategies derived from various cultural domains, such as European art music, Celtic folk, West Indian, or African. The word "progressive" comes from the basic concept of "progress", which refers to development and growth by accumulation, and is often deployed in numerous music genres such as progressive country, progressive folk, progressive jazz, and (most significantly) progressive rock. fact_1 : Charles Ives also borrowed from the "Second Connecticut" on four occasions. fact_2 : Charles Edward Ives ( ; October 20, 1874May 19, 1954) was an American modernist composer. fact_3 : He combined the American popular and church-music traditions of his youth with European art music, and was among the first composers to engage in a systematic program of experimental music, with musical techniques including polytonality, polyrhythm, tone clusters, aleatory elements, and quarter tones, foreshadowing many musical innovations of the 20th century. Answer: 1874May
The answer to this example can be: What is the birthyear of the American composer that borrowed from "Second Connecticut" on four occasions and combined American popular and church-music traditions with European art music?
Here is why: From the fact_1 from context _8, and fact _2 and fact _3 from context _1, we can arrive at 1874 May which is accurate answer of generated question.

OK. solve this:
Context_1 : The Treaty Three Police Service (T3PS) in Ontario began as the Treaty #3 Policing Initiative in August 1999 as directed by the Executive Council of Grand Council of Treaty 3. It officially began operation on August 5, 2003, and became Canada's newest First Nation self-administered police service. Members of Treaty Three Police are appointed as First Nations Constables by the Commissioner of the OPP pursuant to s.54 of the Police Services Act. They have the powers of a police officer for the purpose of carrying out duties specified in their appointments and under federal law have the powers and protections of peace officers. Because First Nations Constables are not police officers as defined by the Police Services Act, their status in law is different but equal to that of a police officer. The jurisdiction of the Treaty Three Police Service includes all signatory Treaty Three First Nations (The Paypom Treaty) previously policed by the OPP administered First Nations Policing Program. The OPP are mandated to provide policing on a reserve, village or any other area not currently under a policing agreement. All operations save major crimes are investigated by Treaty Three First Nations Constable patrol officers and/or the T3PS Crime Unit. The Service exists with the unanimous agreement of the signatory Band Councils or Band Chiefs. Unlike police forces in cities and towns, the Treaty Three Police Service is not required to provide all the regular services of a police force but does provide virtually everything needed (or requests additional OPP resources, e.g. K9 Unit). Context_2 : Special police (also see auxiliary police) usually describes a police force or unit within a police force whose duties and responsibilities are significantly different from other forces in the same country or from other police in the same force, although there is no consistent international definition. A special constable, in most cases, is not a member of a special police force; in countries in the Commonwealth of Nations and often elsewhere, a special constable is a voluntary or part-time member of a national or local police force or a person involved in law enforcement who is not a police officer but has some of the powers of a police officer. Context_3 : A police officer, also known as a policeman, policewoman, police agent, or a police employee is a warranted law employee of a police force. In most countries, "police officer" is a generic term not specifying a particular rank. In most police departments of the United States, "police officer" or "officer" is also the rank held by a regular police officer (i.e. one without supervisory duties). In some nations the use of the rank "officer" is legally reserved for military personnel. Context_4 : Miguel Osvaldo Etchecolatz (born 1 May 1929) is a former senior Argentine police officer, who worked in the Buenos Aires Provincial Police during the first years of the military dictatorship of the 1970s. Etchecolatz was deeply involved in the "anti-subversion operation" known as the National Reorganization Process ("El proceso"). He was first convicted in 1986 of crimes committed during this period, but passage that year of the "Ley de Punto Final," which created amnesty for security officers, meant that he was released without a sentence. In 2003 Congress repealed the law, and the government re-opened prosecution of crimes during the Dirty War. Context_5 : Law enforcement in the Pitcairn Islands is the responsibly of the Pitcairn Islands Police, the smallest British police force, which has just two constables. In the aftermath of child sex revelations (see below) the force did briefly number five constables including Ministry of Defence Police officers on temporary secondment. Historically, and until 2000, a Pitcairn Island resident was appointed as the island group's sole police officer, and also acted as immigration and customs officer. From 2000 to 2015, the combined police, immigration, and customs role was held by a series of foreign professionals on short-term secondment. In 2015 the Pitcairn Government website announced that both previous systems would be employed alongside each other, with one local island police officer and one foreign police officer on secondment, working together. Context_6 : Mario Oscar Ferreyra, better known as Malevo (June 17, 1945 November 21, 2008) was an Argentine police chief. Being a police officer during the Proceso de Reorganizacion Nacional, he participated in the Dirty War, fighting against left-wing guerrilla groups in Tucuman province. After the return of democracy, he would become the chief of Tucuman Provincial Police. In this position, Ferreyra became involved in the dubious death of a number of supposed criminals. He would later be prosecuted and discharged from the force. He shot himself in 2008, when facing his imminent arrest, and his suicide was broadcast live on national TV. Context_7 : Rodolfo Almiron Sena (February 17, 1936 June 5, 2009) was a former Argentine police officer and a leader of an extreme right-wing death squad known as the Triple A, operating in Argentina from 1973 to 1976 against the left-wing of Peronistas and other political dissidents. The group is held responsible for 1,500 murders of government opponents during the terms of Juan and Isabel Peron. Context_8 : Jorge Julio Lopez (born 1929, in Buenos Aires Province, Argentina) is an Argentine retired bricklayer, who was kidnapped during the National Reorganization Process, and disappeared again during the democratic government of President Nestor Kirchner after testifying in trial against Dirty War criminal Miguel Etchecolatz. Context_9 : Arcadio Julio Lopez (born September 15, 1910, date of death unknown) was an Argentinian football defender who played for Argentina in the 1934 FIFA World Cup. He played for many clubs, including Club Atletico Lanus (1931-1934 and 1942), Club Sportivo Buenos Aires (1934), Ferro Carril Oeste (1935-1937) and Boca Juniors (1938-1942). Context_10 : Phajol Moolsan (Thai: ; rtgs:"Phachon Munsan" ; born September 13, 1968) is a Thai boxer. At the 1988 Summer Olympics he won a bronze medal in the men's Bantamweight category, together with Jorge Julio Rocha of Colombia. fact_1 : Jorge Julio Lopez (born 1929, in Buenos Aires Province, Argentina) is an Argentine retired bricklayer, who was kidnapped during the National Reorganization Process, and disappeared again during the democratic government of President Nestor Kirchner after testifying in trial against Dirty War criminal Miguel Etchecolatz. fact_2 : Miguel Osvaldo Etchecolatz (born 1 May 1929) is a former senior Argentine police officer, who worked in the Buenos Aires Provincial Police during the first years of the military dictatorship of the 1970s. Answer: Buenos Aires Provincial Police
Answer:
Jorge Julio Lopez disappeared after testifying against the Argentine police officer who worked in what force during the 1970s?