[Q]: Question: "What factor allows glaciers to form"  Context: "Even at high latitudes, glacier formation is not inevitable. Areas of the Arctic, such as Banks Island, and the McMurdo Dry Valleys in Antarctica are considered polar deserts where glaciers cannot form because they receive little snowfall despite the bitter cold. Cold air, unlike warm air, is unable to transport much water vapor. Even during glacial periods of the Quaternary, Manchuria, lowland Siberia, and central and northern Alaska, though extraordinarily cold, had such light snowfall that glaciers could not form."  Answer:
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[A]: snowfall


[Q]: Question: "How does the ochestra compare to contemporaries?"  Context: "Music is cherished in Boston. The Boston Symphony Orchestra is one of the "Big Five," a group of the greatest American orchestras, and the classical music magazine Gramophone called it one of the "world's best" orchestras. Symphony Hall (located west of Back Bay) is home to the Boston Symphony Orchestra, (and the related Boston Youth Symphony Orchestra, which is the largest youth orchestra in the nation) and the Boston Pops Orchestra. The British newspaper The Guardian called Boston Symphony Hall "one of the top venues for classical music in the world," adding that "Symphony Hall in Boston was where science became an essential part of concert hall design." Other concerts are held at the New England Conservatory's Jordan Hall. The Boston Ballet performs at the Boston Opera House. Other performing-arts organizations located in the city include the Boston Lyric Opera Company, Opera Boston, Boston Baroque (the first permanent Baroque orchestra in the US), and the Handel and Haydn Society (one of the oldest choral companies in the United States). The city is a center for contemporary classical music with a number of performing groups, several of which are associated with the city's conservatories and universities. These include the Boston Modern Orchestra Project and Boston Musica Viva. Several theaters are located in or near the Theater District south of Boston Common, including the Cutler Majestic Theatre, Citi Performing Arts Center, the Colonial Theater, and the Orpheum Theatre."  Answer:
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[A]: The Boston Symphony Orchestra is one of the "Big Five," a group of the greatest American orchestras


[Q]: Question: "Hiltbrand made fewer4 things than?"  Context: "There are eleven Renaissance allegorical statues on public fountains in the Old Town. Nearly all the 16th century fountains, except the Zähringer fountain which was created by Hans Hiltbrand, are the work of the Fribourg master Hans Gieng. One of the more interesting fountains is the Kindlifresserbrunnen (Bernese German: Child Eater Fountain but often translated Ogre Fountain) which is claimed to represent a Jew, the Greek god Chronos or a Fastnacht figure that scares disobedient children."  Answer:
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[A]: Hans Gieng


[Q]: Question: "Trans-splicing and alternate splicing, which one is used for one gene to form new genes?"  Context: "Early work in molecular genetics suggested the model that one gene makes one protein. This model has been refined since the discovery of genes that can encode multiple proteins by alternative splicing and coding sequences split in short section across the genome whose mRNAs are concatenated by trans-splicing."  Answer:
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[A]:
alternative splicing