Problem: History of science:

In Classical Antiquity, the inquiry into the workings of the universe took place both in investigations aimed at such practical goals as establishing a reliable calendar or determining how to cure a variety of illnesses and in those abstract investigations known as natural philosophy. The ancient people who are considered the first scientists may have thought of themselves as natural philosophers, as practitioners of a skilled profession (for example, physicians), or as followers of a religious tradition (for example, temple healers).

Which era was marked by investigating the universe?
---
A: Classical Antiquity

Problem: The earliest known references to the islands as a group appeared in the writings of sea-farers from the ancient Greek colony of Massalia. The original records have been lost; however, later writings, e.g. Avienus's Ora maritima, that quoted from the Massaliote Periplus (6th century BC) and from Pytheas's On the Ocean (circa 325320 BC) have survived. In the 1st century BC, Diodorus Siculus has Prettanike nesos, "the British Island", and Prettanoi, "the Britons". Strabo used (Brettanike), and Marcian of Heraclea, in his Periplus maris exteri, used (the Prettanic Isles) to refer to the islands. Historians today, though not in absolute agreement, largely agree that these Greek and Latin names were probably drawn from native Celtic-language names for the archipelago. Along these lines, the inhabitants of the islands were called the (Priteni or Pretani). The shift from the "P" of Pretannia to the "B" of Britannia by the Romans occurred during the time of Julius Caesar.
The oldest known references to the agreements as a whole appeared where?
---
Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Following the 2007 Federal Election, Dr Brendan Nelson was elected leader by the Parliamentary Liberal Party. On 16 September 2008, in a second contest following a spill motion, Nelson lost the leadership to Malcolm Turnbull. On 1 December 2009, a subsequent leadership election saw Turnbull lose the leadership to Tony Abbott by 42 votes to 41 on the second ballot. Abbott led the party to the 2010 federal election, which saw an increase in the Liberal Party vote and resulted in the first hung parliament since the 1940 election.
Who was elected to the Parliamentary Liberal Party after the 2007 Federal Election?
A: Dr Brendan Nelson

Context and question: Australian citizens and residents from other parts of the nation now have automatic right of residence on the island after meeting these criteria (Immigration (Amendment No. 2) Act 2012). Australian citizens must carry either a passport or a Document of Identity to travel to Norfolk Island. Citizens of all other nations must carry a passport to travel to Norfolk Island even if arriving from other parts of Australia. Holders of Australian visas who travel to Norfolk Island have departed the Australian Migration Zone. Unless they hold a multiple-entry visa, the visa will have ceased; in which case they will require another visa to re-enter mainland Australia.
What do citizens from other nations need in order to talk about Norfolk Island?
Answer: unanswerable

Question: The fortified city temporarily fell to the French invasion in 1672 (the Disaster Year); where the French invasion was only stopped west of Utrecht at the Old Hollandic Waterline. In 1674, only two years after the French left, the centre of Utrecht was struck by a tornado. The halt to building before construction of flying buttresses in the 15th century now proved to be the undoing of the central section of the cathedral of St Martin church which collapsed; creating the current Dom square between the tower and choir. In 1713, Utrecht hosted one of the first international peace negotiations when the Treaty of Utrecht settled the War of the Spanish Succession. Since 1723 Utrecht became the centre of the non-Roman Old Catholic Churches in the world.
Is there an answer to this question: What did Uterecht become the center of in the 17th century?

Answer: unanswerable

^1 Also considered part of Rusyns
^2 Considered transitional between Ukrainians and Belarusians
^3 The ethnic affiliation of the Lemkos has become an ideological conflict. It has been alleged that among the Lemkos the idea of "Carpatho-Ruthenian" nation is supported only by Lemkos residing in Transcarpathia and abroad
^4 Most inhabitants of historic Moravia considered themselves as Czechs but significant amount declared their Moravian nationality, different from that Czech (although people from Bohemia and Moravia use the same official language).
^5 Also considered Poles.
^6 There are sources that show Silesians as part of the Poles. Parts of the southmost population of Upper Silesia is sometimes considered Czech (controversial).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What group is considered part of the Poles?
Ah, so..
Silesians