Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Roads in the US have been paved with materials that include asphalt/bitumen since at least 1870, when a street in front of the Newark, NJ City Hall was paved. In many cases, these early pavings were made from naturally occurring "bituminous rock", such as at Ritchie Mines in Macfarlan in Ritchie County, West Virginia from 1852 to 1873. In 1876, asphalt-based paving was used to pave Pennsylvania Avenue in Washington, DC, in time for the celebration of the national centennial. Asphalt/bitumen was also used for flooring, paving and waterproofing of baths and swimming pools during the early 20th century, following similar trends in Europe.
In front of what NJ building was the street paved with asphalt in 1870?
A: City Hall

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The history of phonology may be traced back to the Ashtadhyayi, the Sanskrit grammar composed by Panini in the 4th century BC. In particular the Shiva Sutras, an auxiliary text to the Ashtadhyayi, introduces what can be considered a list of the phonemes of the Sanskrit language, with a notational system for them that is used throughout the main text, which deals with matters of morphology, syntax and semantics.
During what time period did the Sanskrit language begin?
A: unanswerable

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The context-sensitive button mechanic allows one button to serve a variety of functions, such as talking, opening doors, and pushing, pulling, and throwing objects.[e] The on-screen display shows what action, if any, the button will trigger, determined by the situation. For example, if Link is holding a rock, the context-sensitive button will cause Link to throw the rock if he is moving or targeting an object or enemy, or place the rock on the ground if he is standing still.[f]
What shows what action the rock will trigger?
A: unanswerable

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For decades, the U.S. federal government strenuously tried to force Puerto Ricans to adopt English, to the extent of making them use English as the primary language of instruction in their high schools. It was completely unsuccessful, and retreated from that policy in 1948. Puerto Rico was able to maintain its Spanish language, culture, and identity because the relatively small, densely populated island was already home to nearly a million people at the time of the U.S. takeover, all of those spoke Spanish, and the territory was never hit with a massive influx of millions of English speakers like the vast territory acquired from Mexico 50 years earlier.
How did Puerto Rico stay an English speaking territory?
A:
unanswerable