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.

[EX Q]: Context_1 : Amelita Galli-Curci (18 November 1882 – 26 November 1963) was an Italian coloratura soprano. She was one of the most popular operatic singers of the 20th century, with her recordings selling in large numbers. Context_2 : Ashley Riches is a British operatic baritone. With The Royal Opera, Riches has sung Moralès, opposite Roberto Alagna’s Don José in Bizet's Carmen. In 2014, he sang Mandarin in "Turandot" Context_3 : Roberto Alagna (] ; ] ) (born 7 June 1963) is a French tenor. He was born in Clichy-sous-Bois, Seine-Saint-Denis, France and obtained French citizenship at age 18, while also retaining his previous Italian citizenship. Context_4 : Marius et Fanny is an opera ("opéra comique") in two acts composed by Vladimir Cosma. The libretto by Michel Lengliney, Jean-Pierre Lang, Michel Rivegauche, Antoine Chalamel, Michel Arbatz and Vladimir Cosma is based on Marcel Pagnol's stage and film trilogy "Marius", "Fanny" and "César" (known as the "Trilogie marseillaise" ). The opera premiered on 4 September 2007 at the Opéra de Marseille with Roberto Alagna and Angela Gheorghiu in the title roles. Context_5 : The Devriès were a family of operatic singers over three generations, of Dutch descent. They were mainly active in France, Belgium and the USA in the second half of the 19th and the early 20th centuries. Context_6 : Pasión is a 2011 crossover album by the tenor Roberto Alagna of Spanish-language standards. Context_7 : Roberto Torres Born 10 February 1940; is a Cuban musician from Güines most famous for his interpretation of Simón Díaz's Caballo Viejo. He is considered to be one of the highest authorities in the history of the Cuban music. His singing career with Sonora Matancera puts him at the peaks and among the top singers of Cuba of all times. He has made a valuable contribution, along with Arturo Sandoval, Rosendo Rosell, Celia Cruz, and musicologist Eloy Crespo to the documentary Son, la antesala de la salsa. He is considered one of Cuba's highest assets in music. he also started the careers of many artists singers such as Billy "la voz" Quinones who is also a musician trumpeter/percussionist who at the age of 16 yrs old was Roberto Torres's lead trumpeter and music director by the age of 18. Billy la voz Quinones now sings on his solo CD project as he dedictes to Roberto his version of Caballo Viejo in a new Latin Kompa style in which Billy la voz calls Kompalsa a mix of Haitian French caribbean sounds with charanga vallenato rhythms. Context_8 : Subterranean is a novel by James Rollins. Beneath the ice at the bottom of the Earth is a magnificent subterranean labyrinth, a place of breathtaking wonders – and terrors beyond imagining. A team of specialists led by archaeologist Ashley Carter has been hand-picked to explore this secret place and to uncover the riches it holds. But they are not the first to venture here – and those they follow did not return. There are mysteries here older than humanity, and revelations that could change the world. But there are also things that should not be disturbed – and a devastating truth that could doom Ashley and the expedition: they are not alone. For the caverns are inhabited by an entire subterranean ecosystem of primitive mammals - some intelligent, others savage, all beyond the reach of today's knowledge. Context_9 : Johan Jonatan "Jussi" Björling ( , ] ; 5 February 19119 September 1960) was a Swedish tenor. One of the leading operatic singers of the 20th century, Björling appeared for many years at the Metropolitan Opera in New York and less frequently at the major European opera houses, including the Royal Opera House in London and La Scala in Milan. Context_10 : This 1956 recording based on George Gershwin's opera Porgy and Bess was the second "complete" recording of the opera after the 1951 version, and the first recording of the work to feature jazz singers and musicians instead of operatic singers and a classical orchestra. fact_1 : Ashley Riches is a British operatic baritone. fact_2 : Roberto Alagna (] ; ] ) (born 7 June 1963) is a French tenor. Answer: operatic
[EX A]: Ashley Riches and Roberto Alagna are what types of operatic singers, respectively?

[EX Q]: Context_1 : Surrender is a 1987 American comedy film that was written and directed by Jerry Belson. It stars Sally Field, Michael Caine, Steve Guttenberg, Peter Boyle and Iman. Caine, Field and Boyle previously collaborated together in "Beyond the Poseidon Adventure". Context_2 : Jerry Belson (July 8, 1938 – October 10, 2006) was a writer, director, and producer of Hollywood films for over forty years. Context_3 : Smile is a musical with music by Marvin Hamlisch and book and lyrics by Howard Ashman. It was originally produced on Broadway in 1986. The musical is based loosely on the 1975 comedy film of the same title, from a screenplay by Jerry Belson. Context_4 : The Christian Licorice Store is a 1971 film drama directed by James Frawley. It stars Beau Bridges and Maud Adams. The unusual title is based on lyrics from the song "Pleasant Street" by Tim Buckley. Context_5 : The Muppet Movie is a 1979 musical road comedy film and the first theatrical film featuring the Muppets. Directed by James Frawley and produced by Jim Henson, the film's screenplay was conceived by "The Muppet Show" writers Jerry Juhl and Jack Burns. An American and British venture produced by Henson Associates and ITC Entertainment between the first half and the second half of "The Muppet Show"' s third season, the film depicts Kermit the Frog as he embarks on a cross-country trip to Hollywood, California. Along the way, he encounters several of the Muppets—who all share the same ambition of finding success in professional show business—while being pursued by Doc Hopper, an evil restaurateur with intentions of employing Kermit as a spokesperson for his frog legs business. Context_6 : James Frawley (born September 29, 1936, Houston, Texas) is an American director and actor. He has been a member of the Actors Studio since at least 1961. Context_7 : Daniel Patrick Frawley (born 8 September 1963) is a former Australian rules footballer and football commentator with Fox Sports. He previously coached the Richmond Football Club between 2000 and 2004. He is the nephew of Collingwood player Des Tuddenham and the uncle of current Hawthorn Football Club player James Frawley. Frawley currently serves at the St Kilda Football Club as a specialist defence coach on a part-time basis. Context_8 : Smile is a 1975 DeLuxe Color satirical comedy-drama film directed by Michael Ritchie with a screenplay by Jerry Belson about a beauty pageant in Santa Rosa, California. Context_9 : The End is a 1978 American black comedy directed by and starring Burt Reynolds, written by Jerry Belson, and with music composed by Paul Williams. The film also stars Dom DeLuise, Sally Field, Strother Martin, David Steinberg, Joanne Woodward, Norman Fell, Myrna Loy, Kristy McNichol, Pat O'Brien, Robby Benson and Carl Reiner. Context_10 : Kid Blue is a 1973 film directed by James Frawley and starring Dennis Hopper, Warren Oates, Peter Boyle and Ben Johnson. fact_1 : James Frawley (born September 29, 1936, Houston, Texas) is an American director and actor. fact_2 : Jerry Belson (July 8, 1938 – October 10, 2006) was a writer, director, and producer of Hollywood films for over forty years. Answer: director
[EX A]: James Frawley and Jerry Belson, have which mutual occupation?

[EX Q]: Context_1 : Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO ) from the atmosphere. Seawater is slightly basic (meaning pH > 7), and the process in question is a shift towards pH-neutral conditions rather than a transition to acidic conditions (pH < 7). Ocean alkalinity is not changed by the process, or may increase over long time periods due to carbonate dissolution. An estimated 30–40% of the carbon dioxide from human activity released into the atmosphere dissolves into oceans, rivers and lakes. To achieve chemical equilibrium, some of it reacts with the water to form carbonic acid. Some of these extra carbonic acid molecules react with a water molecule to give a bicarbonate ion and a hydronium ion, thus increasing ocean acidity (H ion concentration). Between 1751 and 1996 surface ocean pH is estimated to have decreased from approximately 8.25 to 8.14, representing an increase of almost 35% in H ion concentration in the world's oceans. Earth System Models project that within the last decade ocean acidity exceeded historical analogues and in combination with other ocean biogeochemical changes could undermine the functioning of marine ecosystems and disrupt the provision of many goods and services associated with the ocean. Context_2 : A deaerator is a device that is widely used for the removal of oxygen and other dissolved gases from the feedwater to steam-generating boilers. In particular, dissolved oxygen in boiler feedwaters will cause serious corrosion damage in steam systems by attaching to the walls of metal piping and other metallic equipment and forming oxides (rust). Dissolved carbon dioxide combines with water to form carbonic acid that causes further corrosion. Most deaerators are designed to remove oxygen down to levels of 7 ppb by weight (0.005 cm³/L) or less as well as essentially eliminating carbon dioxide. Context_3 : In marine and reef aquariums, a calcium reactor creates a balance of alkalinity. An acidic solution is produced by injecting carbon dioxide into a chamber with salt water and calcium rich media. The carbon dioxide lowers the pH by producing a solution high in carbonic acid, and dissolves calcium. The effluent is returned to the reef aquarium where the calcium is consumed by organisms, primarily corals when building skeletons. A calcium reactor is an efficient method to supply calcium to a reef aquarium. Reactors may be used in elaborate freshwater and brackish aquariums where freshwater clams and other invertebrates need a constant supply of calcium. Context_4 : Calcium bicarbonate, also called calcium hydrogen carbonate, has a chemical formula Ca(HCO). The term does not refer to a known solid compound; it exists only in aqueous solution containing the calcium (Ca), bicarbonate (HCO), and carbonate (CO) ions, together with dissolved carbon dioxide (CO). The relative concentrations of these carbon-containing species depend on the pH; bicarbonate predominates within the range 6.36-10.25 in fresh water. Context_5 : Dry ice color show is the formation of carbonic acid (HCO) by the reaction of dry ice, the solid form of carbon dioxide (CO), and water. The reaction between these 2 compounds lower the pH of the solution, therefore making the solution more acidic. Dry ice has a temperature of –78.5 °C and normally exist in gas state. By applying universal indicator to the solution, the changing of the pH can be indicated as the color of the solution changes into the contrast color. This experiment is usually conducted as a classroom demonstration of pH and properties of carbon dioxide since the materials required are handful and can be prepared easily. Solid carbon dioxide can cause frostbite when in contact with the skin, by sticking to the moist tissue, such as wet skin or tongue. Solid carbon dioxide undergoes sublimation upon exposure to air. This means it transforms directly from the solid phase to the gaseous phase without melting into liquid. Context_6 : Carbonic acid is a chemical compound with the chemical formula HCO (equivalently OC(OH)). It is also a name sometimes given to solutions of carbon dioxide in water (carbonated water), because such solutions contain small amounts of HCO. In physiology, carbonic acid is described as "volatile acid" or "respiratory acid", because it is the only acid excreted as a gas by the lungs. It plays an important role in the bicarbonate buffer system to maintain acid–base homeostasis. Context_7 : Senebier was greatly influenced by Swiss naturalist Charles Bonnet. Senebier was also influenced by the Italian animal physiologist and experimental biologist Lazzaro Spallanzani, several of whose works Senebier translated from Italian into French. Spallanzani's chemical research on bodily functions of animals helped lead Senebier towards studying plant chemistry. Although Senebier's first research on plants was a large study on effects of light, he is remembered mainly for the extensive evidence he provided that carbon dioxide ("fixed air" or "carbonic acid," in the terminology of his day) is consumed by plants in the production of oxygen ("dephlogisticated air"), in the physiological process that later became known as photosynthesis. Senebier also found that the amount of oxygen produced is roughly proportional to the amount of carbon dioxide available to the plant. Further, he determined that the green fleshy parts of leaves (the parenchyma) are the sites where carbon dioxide is transformed into oxygen. Senebier also correctly concluded that plants use the carbon in carbon dioxide as a nutriment. Senebier did some of his research jointly with fellow Swiss naturalist François Huber. Context_8 : The total inorganic carbon ("C", or TIC) or dissolved inorganic carbon (DIC) is the sum of inorganic carbon species in a solution. The inorganic carbon species include carbon dioxide, carbonic acid, bicarbonate anion, and carbonate. It is customary to express carbon dioxide and carbonic acid simultaneously as CO* . "C" is a key parameter when making measurements related to the pH of natural aqueous systems, and carbon dioxide flux estimates. Context_9 : A bicarbonate indicator (hydrogencarbonate indicator) is a type of pH indicator that is sensitive enough to show a color change as the concentration of carbon dioxide gas in an aqueous solution increases. The indicator is used in photosynthesis and respiration experiments to find out whether carbon dioxide is being liberated. It is also used to test the carbon dioxide content during gaseous exchange of organisms. When the carbon dioxide content is higher than 0.04%, the initial red color changes to yellow as the pH becomes more acidic. If the carbon dioxide content is lower than 0.04%, it changes from red to magenta and, in relatively very low carbon dioxide concentrations, to purple. Carbon dioxide, even in the concentrations found in exhaled air, will dissolve in the indicator to form carbonic acid, a weak acid, which will lower the pH and give the characteristic colour change. A colour change to purple during photosynthesis shows a reduction in the percentage of carbon dioxide and is sometimes inferred as production of oxygen, but there is not actually any direct evidence for it. Context_10 : Base-richness in ecology is the level in water or soil of chemical bases, such as calcium or magnesium ions. Many organisms are restricted to base-rich environments. Chemical bases are alkalis, and so base-rich environments are neutral or alkaline. Because base-poor environments have few bases, they are dominated by environmental acids (usually organic acids) and so are acidic. However, the relationship between base-richness and acidity is not a rigid one – changes in the levels of acids (such as dissolved carbon dioxide) may significantly change acidity without affecting base-richness. fact_1 :  However, the relationship between base-richness and acidity is not a rigid one – changes in the levels of acids (such as dissolved carbon dioxide) may significantly change acidity without affecting base-richness. fact_2 : Carbonic acid is a chemical compound with the chemical formula HCO (equivalently OC(OH)). Answer: HCO
[EX A]:
Baserichness in ecology is the level in water or soil of chemical bases, such as calcium or magnesium ions, changes in the levels of acids such as dissolved carbon dioxide may significantly change acidity without affecting baserichness, Carbonic acid is a chemical compound with which chemical formula ?