Problem: Hard rock:

By the end of the decade a distinct genre of hard rock was emerging with bands like Led Zeppelin, who mixed the music of early rock bands with a more hard-edged form of blues rock and acid rock on their first two albums Led Zeppelin (1969) and Led Zeppelin II (1969), and Deep Purple, who began as a progressive rock group but achieved their commercial breakthrough with their fourth and distinctively heavier album, In Rock (1970). Also significant was Black Sabbath's Paranoid (1970), which combined guitar riffs with dissonance and more explicit references to the occult and elements of Gothic horror. All three of these bands have been seen as pivotal in the development of heavy metal, but where metal further accentuated the intensity of the music, with bands like Judas Priest following Sabbath's lead into territory that was often "darker and more menacing", hard rock tended to continue to remain the more exuberant, good-time music.

What was the title of Deep Purple's hard rock 1970 album?
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A: In Rock

Problem: New York City:

Major tourist destinations include Times Square; Broadway theater productions; the Empire State Building; the Statue of Liberty; Ellis Island; the United Nations Headquarters; museums such as the Metropolitan Museum of Art; greenspaces such as Central Park and Washington Square Park; Rockefeller Center; the Manhattan Chinatown; luxury shopping along Fifth and Madison Avenues; and events such as the Halloween Parade in Greenwich Village; the Macy's Thanksgiving Day Parade; the lighting of the Rockefeller Center Christmas Tree; the St. Patrick's Day parade; seasonal activities such as ice skating in Central Park in the wintertime; the Tribeca Film Festival; and free performances in Central Park at Summerstage. Major attractions in the boroughs outside Manhattan include Flushing Meadows-Corona Park and the Unisphere in Queens; the Bronx Zoo; Coney Island, Brooklyn; and the New York Botanical Garden in the Bronx. The New York Wheel, a 630-foot ferris wheel, was under construction at the northern shore of Staten Island in 2015, overlooking the Statue of Liberty, New York Harbor, and the Lower Manhattan skyline.

At what location is a Christmas tree famously lit every year?
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A: Rockefeller Center

Problem: Planck constant:

The photoelectric effect is the emission of electrons (called "photoelectrons") from a surface when light is shone on it. It was first observed by Alexandre Edmond Becquerel in 1839, although credit is usually reserved for Heinrich Hertz, who published the first thorough investigation in 1887. Another particularly thorough investigation was published by Philipp Lenard in 1902. Einstein's 1905 paper discussing the effect in terms of light quanta would earn him the Nobel Prize in 1921, when his predictions had been confirmed by the experimental work of Robert Andrews Millikan. The Nobel committee awarded the prize for his work on the photo-electric effect, rather than relativity, both because of a bias against purely theoretical physics not grounded in discovery or experiment, and dissent amongst its members as to the actual proof that relativity was real.

When was the photoelectric effect last observed?
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A: unanswerable

Problem: Architecture:

In the early 19th century, Augustus Welby Northmore Pugin wrote Contrasts (1836) that, as the titled suggested, contrasted the modern, industrial world, which he disparaged, with an idealized image of neo-medieval world. Gothic architecture, Pugin believed, was the only "true Christian form of architecture."

Who wrote the book Contrasts?
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A:
Augustus Welby Northmore Pugin