Problem: Mesozoic:

The Late Triassic spans from 237 million to 200 million years ago. Following the bloom of the Middle Triassic, the Late Triassic featured frequent heat spells, as well as moderate precipitation (10-20 inches per year). The recent warming led to a boom of reptilian evolution on land as the first true dinosaurs evolve, as well as pterosaurs. All this climatic change, however, resulted in a large die-out known as the Triassic-Jurassic extinction event, in which all archosaurs (excluding ancient crocodiles), most synapsids, and almost all large amphibians went extinct, as well as 34% of marine life in the fourth mass extinction event of the world. The cause is debatable.

What was the only archosaur to survive the fourth mass extinction?
---
A: crocodiles


Problem: Britain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing in South America, particularly in Peru around 1000 AD; it proceeded at a much slower rate on other continents. Copper burial ornamentals from the 15th century have been uncovered, but the metal's commercial production did not start until the early 20th century.
Who were the first copper miners in North America?
---
Answer: Native Americans


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The next year Madonna and Maverick sued Warner Music Group and its former parent company Time Warner, claiming that mismanagement of resources and poor bookkeeping had cost the company millions of dollars. In return, Warner filed a countersuit alleging that Maverick had lost tens of millions of dollars on its own. The dispute was resolved when the Maverick shares, owned by Madonna and Ronnie Dashev, were purchased by Warner. Madonna and Dashev's company became a wholly owned subsidiary of Warner Music, but Madonna was still signed to Warner under a separate recording contract.
Warner filed a countersuit stating that who lost 10 of millions of dollars on its own?
A: Maverick


Context and question: Possibly the first venture into fictional treatments of Chopin's life was a fanciful operatic version of some of its events. Chopin was written by Giacomo Orefice and produced in Milan in 1901. All the music is derived from that of Chopin.
What is thought to be the first fictionalized work about Chopin?
Answer: Chopin


Question: According to heraldic sources total number of legal ennoblements issued between the 14th century and the mid-18th century, is estimated at approximately 800. This is an average of only about two ennoblements per year or only 0.000 000 14 – 0.000 001 of historical population. Compare: historical demography of Poland.
Is there an answer to this question: What is average for ennoblements between 14th and min 18th century.

Answer: two ennoblements per year


Question: In 1832, South Carolina passed an ordinance of nullification, a procedure by which a state could, in effect, repeal a federal law; it was directed against the most recent tariff acts. Soon, federal soldiers were dispensed to Charleston's forts, and five United States Coast Guard cutters were detached to Charleston Harbor "to take possession of any vessel arriving from a foreign port, and defend her against any attempt to dispossess the Customs Officers of her custody until all the requirements of law have been complied with." This federal action became known as the Charleston incident. The state's politicians worked on a compromise law in Washington to gradually reduce the tariffs.
Is there an answer to this question: A compromise law from the state politicans never achieved what?

Answer:
unanswerable