Input: Read this: Canada has the world's largest deposit of natural bitumen in the Athabasca oil sands and Canadian First Nations along the Athabasca River had long used it to waterproof their canoes. In 1719, a Cree Indian named Wa-Pa-Su brought a sample for trade to Henry Kelsey of the Hudson's Bay Company, who was the first recorded European to see it. However, it wasn't until 1787 that fur trader and explorer Alexander MacKenzie saw the Athabasca oil sands and said, "At about 24 miles from the fork (of the Athabasca and Clearwater Rivers) are some bituminous fountains into which a pole of 20 feet long may be inserted without the least resistance."
Question: In what year did Athabasca see the oil sands?

Output: unanswerable

QUES: Cossacks, although Slavic-speaking and Orthodox Christians, came from a mix of ethnic backgrounds, including Tatars and other Turks. Many early members of the Terek Cossacks were Ossetians.

What ethnic backgrounds came from Cossacks?
What is the answer?
ANS: unanswerable

QUES: During this early period, it was more usual that neither major party grouping (Federalists and Democratic-Republicans) had an official leader. In 1813, for instance, a scholar recounts that the Federalist minority of 36 Members needed a committee of 13 "to represent a party comprising a distinct minority" and "to coordinate the actions of men who were already partisans in the same cause." In 1828, a foreign observer of the House offered this perspective on the absence of formal party leadership on Capitol Hill:
In early 19th century, what were 2 common parties?

ANS: (Federalists and Democratic-Republicans)

Dog behavior is the internally coordinated responses (actions or inactions) of the domestic dog (individuals or groups) to internal and/or external stimuli. As the oldest domesticated species, with estimates ranging from 9,00030,000 years BCE, the minds of dogs inevitably have been shaped by millennia of contact with humans. As a result of this physical and social evolution, dogs, more than any other species, have acquired the ability to understand and communicate with humans and they are uniquely attuned to our behaviors. Behavioral scientists have uncovered a surprising set of social-cognitive abilities in the otherwise humble domestic dog. These abilities are not possessed by the dog's closest canine relatives nor by other highly intelligent mammals such as great apes. Rather, these skills parallel some of the social-cognitive skills of human children.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Dog minds have been shaped by thousands of years of contact with what species?
Ah, so.. humans.

Question: On November 2011, the sailing boat Puma's Mar Mostro participant in Volvo Ocean Race arrived to the island after her mast broke in the first leg from Alicante and Cape Town. This event made the island, its inhabitants and lifestyle known worldwide thanks to the media reports.
Try to answer this question if possible: What made Cape Town known worldwide?
Answer: unanswerable

Question: In 2003, additional UN sanctions were placed on Liberian timber exports, which had risen from US$5 million in 1997 to over US$100 million in 2002 and were believed to be funding rebels in Sierra Leone. These sanctions were lifted in 2006. Due in large part to foreign aid and investment inflow following the end of the war, Liberia maintains a large account deficit, which peaked at nearly 60% in 2008. Liberia gained observer status with the World Trade Organization in 2010 and is in the process of acquiring full member status.
Try to answer this question if possible: Liberia's account deficit peaked at what percentage in 2008?
Answer:
60%