Problem: Copper:

Copper has been used since ancient times as a durable, corrosion resistant, and weatherproof architectural material. Roofs, flashings, rain gutters, downspouts, domes, spires, vaults, and doors have been made from copper for hundreds or thousands of years. Copper's architectural use has been expanded in modern times to include interior and exterior wall cladding, building expansion joints, radio frequency shielding, and antimicrobial indoor products, such as attractive handrails, bathroom fixtures, and counter tops. Some of copper's other important benefits as an architectural material include its low thermal movement, light weight, lightning protection, and its recyclability.

What has copper been avoided as since ancient times?
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A: unanswerable


Problem: In February 2015, YouTube announced the launch of a new app specifically for use by children visiting the site, called YouTube Kids. It allows parental controls and restrictions on who can upload content, and is available for both Android and iOS devices. Later on August 26, 2015, YouTube Gaming was launched, a platform for video gaming enthusiasts intended to compete with Twitch.tv. 2015 also saw the announcement of a premium YouTube service titled YouTube Red, which provides users with both ad-free content as well as the ability to download videos among other features.
What's the name of the program that gives ads?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Leucothea was daughter of Orchamus and sister of Clytia. She fell in love with Apollo who disguised himself as Leucothea's mother to gain entrance to her chambers. Clytia, jealous of her sister because she wanted Apollo for herself, told Orchamus the truth, betraying her sister's trust and confidence in her. Enraged, Orchamus ordered Leucothea to be buried alive. Apollo refused to forgive Clytia for betraying his beloved, and a grieving Clytia wilted and slowly died. Apollo changed her into an incense plant, either heliotrope or sunflower, which follows the sun every day.
Who did Leucothea fall in love with?
A: Leucothea


Context and question: In ultra high vacuum systems, some very "odd" leakage paths and outgassing sources must be considered. The water absorption of aluminium and palladium becomes an unacceptable source of outgassing, and even the adsorptivity of hard metals such as stainless steel or titanium must be considered. Some oils and greases will boil off in extreme vacuums. The permeability of the metallic chamber walls may have to be considered, and the grain direction of the metallic flanges should be parallel to the flange face.
What becomes a concern in an ultra high vacuum system regarding aluminum or palladium?
Answer: water absorption


Question: Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.
Is there an answer to this question: A user interface, UI backend, layout engine and other things are part of what?

Answer: Web browsers


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Galileo Galilei was brought before the Inquisition for heresy, but abjured his views and was sentenced to house arrest, under which he spent the rest of his life. Galileo was found "vehemently suspect of heresy", namely of having held the opinions that the Sun lies motionless at the centre of the universe, that the Earth is not at its centre and moves, and that one may hold and defend an opinion as probable after it has been declared contrary to Holy Scripture. He was required to "abjure, curse and detest" those opinions.
Who found Galileo guilty of heresy?
A:
unanswerable