Input: Read this: In general relativity, a vanishing stress-energy tensor implies, through Einstein field equations, the vanishing of all the components of the Ricci tensor. Vacuum does not mean that the curvature of space-time is necessarily flat: the gravitational field can still produce curvature in a vacuum in the form of tidal forces and gravitational waves (technically, these phenomena are the components of the Weyl tensor). The black hole (with zero electric charge) is an elegant example of a region completely "filled" with vacuum, but still showing a strong curvature.
Question: what is a perfect example of a filled vacuum showing a curvature?

Output: The black hole


QUES: During the Nimrod Expedition led by Ernest Shackleton in 1907, parties led by Edgeworth David became the first to climb Mount Erebus and to reach the South Magnetic Pole. Douglas Mawson, who assumed the leadership of the Magnetic Pole party on their perilous return, went on to lead several expeditions until retiring in 1931. In addition, Shackleton himself and three other members of his expedition made several firsts in December 1908 – February 1909: they were the first humans to traverse the Ross Ice Shelf, the first to traverse the Transantarctic Mountains (via the Beardmore Glacier), and the first to set foot on the South Polar Plateau. An expedition led by Norwegian polar explorer Roald Amundsen from the ship Fram became the first to reach the geographic South Pole on 14 December 1911, using a route from the Bay of Whales and up the Axel Heiberg Glacier. One month later, the doomed Scott Expedition reached the pole.

What did the party led by Shckleton climb?
What is the answer?
ANS: unanswerable


QUES: Melbourne's live performance institutions date from the foundation of the city, with the first theatre, the Pavilion, opening in 1841. The city's East End Theatre District includes theatres that similarly date from 1850s to the 1920s, including the Princess Theatre, Regent Theatre, Her Majesty's Theatre, Forum Theatre, Comedy Theatre, and the Athenaeum Theatre. The Melbourne Arts Precinct in Southbank is home to Arts Centre Melbourne, which includes the State Theatre, Hamer Hall, the Playhouse and the Fairfax Studio. The Melbourne Recital Centre and Southbank Theatre (principal home of the MTC, which includes the Sumner and Lawler performance spaces) are also located in Southbank. The Sidney Myer Music Bowl, which dates from 1955, is located in the gardens of Kings Domain; and the Palais Theatre is a feature of the St Kilda Beach foreshore.
In what year did the Pavilion open?

ANS: 1841


Launched worldwide across 2005–2006, the Xbox 360 was initially in short supply in many regions, including North America and Europe. The earliest versions of the console suffered from a high failure rate, indicated by the so-called "Red Ring of Death", necessitating an extension of the device's warranty period. Microsoft released two redesigned models of the console: the Xbox 360 S in 2010, and the Xbox 360 E in 2013. As of June 2014, 84 million Xbox 360 consoles have been sold worldwide, making it the sixth-highest-selling video game console in history, and the highest-selling console made by an American company. Although not the best-selling console of its generation, the Xbox 360 was deemed by TechRadar to be the most influential through its emphasis on digital media distribution and multiplayer gaming on Xbox Live. The Xbox 360's successor, the Xbox One, was released on November 22, 2013. Microsoft has stated they plan to support the Xbox 360 until 2016. The Xbox One is also backwards compatible with the Xbox 360.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did the new extension of the warranty expire?
Ah, so.. unanswerable


Question: Later the Muslims invaded Spain (711), but the Arabs and Moors never managed to have any real control over Galicia, which was later incorporated into the expanding Christian Kingdom of Asturias, usually known as Gallaecia or Galicia (Yillīqiya and Galīsiya) by Muslim Chroniclers, as well as by many European contemporaries. This era consolidated Galicia as a Christian society which spoke a Romance language. During the next century Galician noblemen took northern Portugal, conquering Coimbra in 871, thus freeing what were considered the southernmost city of ancient Galicia.
Try to answer this question if possible: Though the Muslims couldn't take full control of Galicia, when was it that they invaded Spain?
Answer: 711


Input: Read this: Some 97 percent of male BYU graduates and 32 percent of female graduates took a hiatus from their undergraduate studies at one point to serve as LDS missionaries. In October 2012, the LDS Church announced at its general conference that young men could serve a mission after they turn 18 and have graduated from high school, rather than after age 19 under the old policy. Many young men would often attend a semester or two of higher education prior to beginning missionary service. This policy change will likely impact what has been the traditional incoming freshman class at BYU. Female students may now begin their missionary service anytime after turning 19, rather than age 21 under the previous policy. For males, a full-time mission is two years in length, and for females it lasts 18 months.
Question: What did the LSD Church announce in October 2012?

Output:
unanswerable