Problem: Liberal Party of Australia:

Fraser maintained some of the social reforms of the Whitlam era, while seeking increased fiscal restraint. His government included the first Aboriginal federal parliamentarian, Neville Bonner, and in 1976, Parliament passed the Aboriginal Land Rights Act 1976, which, while limited to the Northern Territory, affirmed "inalienable" freehold title to some traditional lands. Fraser established the multicultural broadcaster SBS, accepted Vietnamese refugees, opposed minority white rule in Apartheid South Africa and Rhodesia and opposed Soviet expansionism. A significant program of economic reform however was not pursued. By 1983, the Australian economy was suffering with the early 1980s recession and amidst the effects of a severe drought. Fraser had promoted "states' rights" and his government refused to use Commonwealth powers to stop the construction of the Franklin Dam in Tasmania in 1982. Liberal minister, Don Chipp split off from the party to form a new social liberal party, the Australian Democrats in 1977. Fraser won further substantial majorities at the 1977 and 1980 elections, before losing to the Bob Hawke led Australian Labor Party in the 1983 election.

Who did Frazer eventually lose to in 1976?
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A: unanswerable


Problem: Iron is usually found as iron ore on Earth, except for one deposit of native iron in Greenland, which was used by the Inuit people. Native copper, however, was found worldwide, along with silver, gold and platinum, which were also used to make tools, jewelry, and other objects since Neolithic times. Copper was the hardest of these metals, and the most widely distributed. It became one of the most important metals to the ancients. Eventually, humans learned to smelt metals such as copper and tin from ore, and, around 2500 BC, began alloying the two metals to form bronze, which is much harder than its ingredients. Tin was rare, however, being found mostly in Great Britain. In the Middle East, people began alloying copper with zinc to form brass. Ancient civilizations took into account the mixture and the various properties it produced, such as hardness, toughness and melting point, under various conditions of temperature and work hardening, developing much of the information contained in modern alloy phase diagrams. Arrowheads from the Chinese Qin dynasty (around 200 BC) were often constructed with a hard bronze-head, but a softer bronze-tang, combining the alloys to prevent both dulling and breaking during use.
Which metal important to the ancients is the hardest one?
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Answer: Copper


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Deuterostomes differ from protostomes in several ways. Animals from both groups possess a complete digestive tract. However, in protostomes, the first opening of the gut to appear in embryological development (the archenteron) develops into the mouth, with the anus forming secondarily. In deuterostomes the anus forms first, with the mouth developing secondarily. In most protostomes, cells simply fill in the interior of the gastrula to form the mesoderm, called schizocoelous development, but in deuterostomes, it forms through invagination of the endoderm, called enterocoelic pouching. Deuterostome embryos undergo radial cleavage during cell division, while protostomes undergo spiral cleavage.
What is the process in which the mesoderm is formed through invagination of the endoderm called?
A: enterocoelic pouching


Context and question: In 1609, English explorer Henry Hudson re-discovered the region when he sailed his ship the Halve Maen ("Half Moon" in Dutch) into New York Harbor while searching for the Northwest Passage to the Orient for his employer, the Dutch East India Company. He proceeded to sail up what he named the North River, also called the Mauritis River, and now known as the Hudson River, to the site of the present-day New York State capital of Albany in the belief that it might represent an oceanic tributary. When the river narrowed and was no longer saline, he realized it was not a maritime passage and sailed back downriver. He made a ten-day exploration of the area and claimed the region for his employer. In 1614, the area between Cape Cod and Delaware Bay would be claimed by the Netherlands and called Nieuw-Nederland (New Netherland).
Which explorer sailed his ship into New York harbor in 1609?
Answer: Henry Hudson


Question: The city also boasts an efficient network of public transportation, which mainly consists of bus, taxi and metro systems. The bus network, which is currently run by three companies since 2011, provides more than 370 routes covering all parts of the city and suburban areas. Nanjing Metro Line 1, started service on September 3, 2005, with 16 stations and a length of 21.72 km. Line 2 and the 24.5 km-long south extension of Line 1 officially opened to passenger service on May 28, 2010. At present, Nanjing has a metro system with a grand total of 223.6 kilometers (138.9 mi) of route and 121 stations. They are Line 1, Line 2, Line 3, Line 10, Line S1 and Line S8. The city is planning to complete a 17-line Metro and light-rail system by 2030. The expansion of the Metro network will greatly facilitate the intracity transportation and reduce the currently heavy traffic congestion.
Is there an answer to this question: What are the main types of public transportation?

Answer: bus, taxi and metro systems


Problem: Printed circuit board:

Multi-layer printed circuit boards have trace layers inside the board. This is achieved by laminating a stack of materials in a press by applying pressure and heat for a period of time. This results in an inseparable one piece product. For example, a four-layer PCB can be fabricated by starting from a two-sided copper-clad laminate, etch the circuitry on both sides, then laminate to the top and bottom pre-preg and copper foil. It is then drilled, plated, and etched again to get traces on top and bottom layers.

Single-layer printed circuit boards have trace layers where?
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A:
unanswerable