Problem: Wayback Machine:

The Wayback Machine is a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive, a nonprofit organization, based in San Francisco, California, United States. It was set up by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet. The service enables users to see archived versions of web pages across time, which the archive calls a "three dimensional index."

Which company made the World Wide Web?
---
A: unanswerable


Problem: Elizabeth's personal fortune has been the subject of speculation for many years. Jock Colville, who was her former private secretary and a director of her bank, Coutts, estimated her wealth in 1971 at £2 million (equivalent to about £25 million today). In 1993, Buckingham Palace called estimates of £100 million "grossly overstated". She inherited an estimated £70 million estate from her mother in 2002. The Sunday Times Rich List 2015 estimated her private wealth at £340 million, making her the 302nd richest person in the UK.
Where does Elizabeth's wealth place her in the list of the richest in the UK?
---
Answer: 302nd


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Some theories propose that all individuals benefit from a variety of learning modalities, while others suggest that individuals may have preferred learning styles, learning more easily through visual or kinesthetic experiences. A consequence of the latter theory is that effective teaching should present a variety of teaching methods which cover all three learning modalities so that different students have equal opportunities to learn in a way that is effective for them. Guy Claxton has questioned the extent that learning styles such as Visual, Auditory and Kinesthetic(VAK) are helpful, particularly as they can have a tendency to label children and therefore restrict learning. Recent research has argued "there is no adequate evidence base to justify incorporating learning styles assessments into general educational practice."
What should be included in effective teaching?
A: teaching methods which cover all three learning modalities


Context and question: A number of BYU alumni have found success in professional sports, representing the University in 7 MLB World Series, 5 NBA Finals, and 25 NFL Super Bowls. In baseball, BYU alumni include All-Stars Rick Aguilera '83, Wally Joyner '84, and Jack Morris '76. Professional basketball players include three-time NBA champion Danny Ainge '81, 1952 NBA Rookie of the Year and 4-time NBA All-Star Mel Hutchins '51,[citation needed] three-time Olympic medalist and Hall of Famer Krešimir Ćosić '73, and consensus 2011 national college player of the year Jimmer Fredette '11, currently with the New York Knicks organization. BYU also claims notable professional football players including two-time NFL MVP and Super Bowl MVP and Pro Football Hall of Fame quarterback Steve Young '84 & J.D. '96, Heisman Trophy winner Ty Detmer '90, and two-time Super Bowl winner Jim McMahon. In golf, BYU alumni include two major championship winners: Johnny Miller ('69) at the 1973 U.S. Open and 1976 British Open and Mike Weir ('92) at the 2003 Masters.
What BUY alumni won the Heisman Trophy?
Answer: unanswerable


Question: Greek colonies and communities have been historically established on the shores of the Mediterranean Sea and Black Sea, but the Greek people have always been centered around the Aegean and Ionian seas, where the Greek language has been spoken since the Bronze Age. Until the early 20th century, Greeks were distributed between the Greek peninsula, the western coast of Asia Minor, the Black Sea coast, Cappadocia in central Anatolia, Egypt, the Balkans, Cyprus, and Constantinople. Many of these regions coincided to a large extent with the borders of the Byzantine Empire of the late 11th century and the Eastern Mediterranean areas of ancient Greek colonization. The cultural centers of the Greeks have included Athens, Thessalonica, Alexandria, Smyrna, and Constantinople at various periods.
Is there an answer to this question: Which two seas have been least central to Greek history?

Answer: unanswerable


Question: New or "virgin" heavy/heavyweight (180–220 g) vinyl is commonly used for modern audiophile vinyl releases in all genres. Many collectors prefer to have heavyweight vinyl albums, which have been reported to have better sound than normal vinyl because of their higher tolerance against deformation caused by normal play. 180 g vinyl is more expensive to produce only because it uses more vinyl. Manufacturing processes are identical regardless of weight. In fact, pressing lightweight records requires more care. An exception is the propensity of 200 g pressings to be slightly more prone to non-fill, when the vinyl biscuit does not sufficiently fill a deep groove during pressing (percussion or vocal amplitude changes are the usual locations of these artifacts). This flaw causes a grinding or scratching sound at the non-fill point.
Is there an answer to this question: Which pressing of vinyl require more attention to detail, lightweight or heavyweight?

Answer:
lightweight records requires more care