Question: Mining was important in Thuringia since the later Middle Ages, especially within the mining towns of the Thuringian Forest such as Schmalkalden, Suhl and Ilmenau. Following the industrial revolution, the old iron, copper and silver mines declined because the competition from imported metal was too strong. On the other hand, the late 19th century brought new types of mines to Thuringia: the lignite surface mining around Meuselwitz near Altenburg in the east of the Land started in the 1870s, and two potash mining districts were established around 1900. These are the Sudharzrevier in the north of the state, between Bischofferode in the west and Roleben in the east with Sondershausen at its centre, and the Werrarevier on the Hessian border around Vacha and Bad Salzungen in the west. Together, they accounted for a significant part of the world's potash production in the mid-20th century. After the reunification, the Sudharzrevier was abandoned, whereas K+S took over the mines in the Werrarevier. Between 1950 and 1990, uranium mining was also important to cover the Soviet Union's need for this metal. The centre was Ronneburg near Gera in eastern Thuringia and the operating company Wismut was under direct Soviet control.
Is there an answer to this question: Which towns in Thuringia are known as mining towns?

Answer: Schmalkalden, Suhl and Ilmenau

Question: The shallow waters of the Southeast Asian coral reefs have the highest levels of biodiversity for the world's marine ecosystems, where coral, fish and molluscs abound. According to Conservation International, marine surveys suggest that the marine life diversity in the Raja Ampat (Indonesia) is the highest recorded on Earth. Diversity is considerably greater than any other area sampled in the Coral Triangle composed of Indonesia, Philippines, and Papua New Guinea. The Coral Triangle is the heart of the world's coral reef biodiversity, the Verde Passage is dubbed by Conservation International as the world's "center of the center of marine shorefish biodiversity". The whale shark, the world's largest species of fish and 6 species of sea turtles can also be found in the South China Sea and the Pacific Ocean territories of the Philippines.
Is there an answer to this question: What ecosystem has the lowest biodiversity in Asia?

Answer: unanswerable

Question: The second decline was not as complete as the first. Thousands of people had learned to play the instrument. Even as the second wave of mandolin popularity declined in the early 20th century, new versions of the mandolin began to be used in new forms of music. Luthiers created the resonator mandolin, the flatback mandolin, the carved-top or arched-top mandolin, the mandolin-banjo and the electric mandolin. Musicians began playing it in Celtic, Bluegrass, Jazz and Rock-n-Roll styles and Classical too.
Is there an answer to this question: Who created the resonator mandolin in the early 20th century?

Answer: unanswerable

Question: On April 26, 1496 King John I Albert granted the Privilege of Piotrkow (Polish: "Przywilej piotrkowski", "konstytucja piotrkowska" or "statuty piotrkowskie"), increasing the nobility's feudal power over serfs. It bound the peasant to the land, as only one son (not the eldest) was permitted to leave the village; townsfolk (Polish: "mieszczanstwo") were prohibited from owning land; and positions in the Church hierarchy could be given only to nobles.
Is there an answer to this question: Who was allowed to leave the village?

Answer:
one son (not the eldest)