Problem: American Idol:

David Archuleta's performance of John Lennon's "Imagine" was considered by many as one of the best of the season. Jennifer Lopez, who was brought in as a judge in season ten, called it a beautiful song-moment that she will never forget. Jason Castro's semi-final performance of "Hallelujah" also received considerable attention, and it propelled Jeff Buckley's version of the song to the top of the Billboard digital song chart. This was the first season in which contestants' recordings were released onto iTunes after their performances, and although sales information was not released so as not to prejudice the contest, leaked information indicated that contestants' songs frequently reached the top of iTunes sales charts.

Which David Archuletta cover was thought to be the best of the season by many?
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A: John Lennon's "Imagine"

Problem: Stout and porter are dark beers made using roasted malts or roast barley, and typically brewed with slow fermenting yeast. There are a number of variations including Baltic porter, dry stout, and Imperial stout. The name Porter was first used in 1721 to describe a dark brown beer popular with the street and river porters of London. This same beer later also became known as stout, though the word stout had been used as early as 1677. The history and development of stout and porter are intertwined.
What are made with slow fermenting malts?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Guests ascending to the 67th, 69th, and 70th level observation decks (dubbed "Top of the Rock") atop the GE Building at Rockefeller Center in New York City ride a high-speed glass-top elevator. When entering the cab, it appears to be any normal elevator ride. However, once the cab begins moving, the interior lights turn off and a special blue light above the cab turns on. This lights the entire shaft, so riders can see the moving cab through its glass ceiling as it rises and lowers through the shaft. Music plays and various animations are also displayed on the ceiling. The entire ride takes about 60 seconds.
What type of elevator is featured?
A: high-speed glass-top

Context and question: In 1989, Prince Andrew launched the replacement RMS St Helena to serve the island; the vessel was specially built for the CardiffCape Town route and features a mixed cargo/passenger layout.
What route was the replacement RMS St Helena built for?
Answer: CardiffCape Town route

Question: Portugal has developed a specific culture while being influenced by various civilizations that have crossed the Mediterranean and the European continent, or were introduced when it played an active role during the Age of Discovery. In the 1990s and 2000s (decade), Portugal modernized its public cultural facilities, in addition to the Calouste Gulbenkian Foundation established in 1956 in Lisbon. These include the Belem Cultural Centre in Lisbon, Serralves Foundation and the Casa da Musica, both in Porto, as well as new public cultural facilities like municipal libraries and concert halls that were built or renovated in many municipalities across the country. Portugal is home to fifteen UNESCO World Heritage Sites, ranking it 8th in Europe and 17th in the world.
Is there an answer to this question: What are some examples of Portugal's public cultural facilities?

Answer: Belem Cultural Centre in Lisbon, Serralves Foundation and the Casa da Musica

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The enormous success of the show and the revenue it generated was transformative for Fox Broadcasting Company. American Idol and fellow competing shows Survivor and Who Wants to Be a Millionaire were altogether credited for expanding reality television programming in the United States in the 1990s and 2000s, and Idol became the most watched non-scripted primetime television series for almost a decade, from 2003 to 2012, breaking records on U.S. television (dominated by drama shows and sitcoms in the preceding decades).
For how many years was American Idol the highest rated reality show on television?
A:
9