Problem: Arena Football League:

On September 30, 1987, Foster filed an application with the United States Patent and Trademark Office to patent his invented sport. The patent application covered the rules of the game, specifically detailing the goalposts and rebound netting and their impact on gameplay. Foster's application was granted on March 27, 1990. The patent expired on September 30, 2007.

On what date did Foster apply for a patent on arena football?
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A: September 30, 1987

Problem: The railroads opened up the Great Plains for settlement, for now it was possible to ship wheat and other crops at low cost to the urban markets in the East, and Europe. Homestead land was free for American settlers. Railroads sold their land at cheap rates to immigrants in expectation they would generate traffic as soon as farms were established. Immigrants poured in, especially from Germany and Scandinavia. On the plains, very few single men attempted to operate a farm or ranch by themselves; they clearly understood the need for a hard-working wife, and numerous children, to handle the many chores, including child-rearing, feeding and clothing the family, managing the housework, feeding the hired hands, and, especially after the 1930s, handling paperwork and financial details. During the early years of settlement, farm women played an integral role in assuring family survival by working outdoors. After approximately one generation, women increasingly left the fields, thus redefining their roles within the family. New technology including sewing and washing machines encouraged women to turn to domestic roles. The scientific housekeeping movement, promoted across the land by the media and government extension agents, as well as county fairs which featured achievements in home cookery and canning, advice columns for women regarding farm bookkeeping, and home economics courses in the schools.
what did the railroads make it easy to do?
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Answer: ship wheat and other crops

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Federal law originates with the Constitution, which gives Congress the power to enact statutes for certain limited purposes like regulating interstate commerce. The United States Code is the official compilation and codification of the general and permanent federal statutes. Many statutes give executive branch agencies the power to create regulations, which are published in the Federal Register and codified into the Code of Federal Regulations. Regulations generally also carry the force of law under the Chevron doctrine. Many lawsuits turn on the meaning of a federal statute or regulation, and judicial interpretations of such meaning carry legal force under the principle of stare decisis.
What is an example of something Congress cannot regulate?
A: unanswerable

Context and question: On March 27, 2015 Sassou Nguesso announced that his government would hold a referendum to change the country's 2002 constitution and allow him to run for a third consecutive term in office. On October 25 the government held a referendum to allow Sassou Nguesso to run in the next election. The government claimed that the proposal as approved by 92 percent of voters with 72 percent of eligible voters participating. The opposition, who had boycotted the referendum claimed that the government's statistics were false and that the vote was a sham.
Which term did the new constitution allow Sassou to pursue?
Answer: third

Question: In Southeast Asia, Muslim students have a choice of attending a secular government or an Islamic school. Madaris or Islamic schools are known as Sekolah Agama (Malay: religious school) in Malaysia and Indonesia, (Thai: school of Islam) in Thailand and madaris in the Philippines. In countries where Islam is not the majority or state religion, Islamic schools are found in regions such as southern Thailand (near the Thai-Malaysian border) and the southern Philippines in Mindanao, where a significant Muslim population can be found.
Is there an answer to this question: What region of Thailand does not have madaris?

Answer: unanswerable

Question: Vladimir had been prince of Novgorod when his father Sviatoslav I died in 972. He was forced to flee to Scandinavia in 976 after his half-brother Yaropolk had murdered his other brother Oleg and taken control of Rus. In Scandinavia, with the help of his relative Earl Hakon Sigurdsson, ruler of Norway, Vladimir assembled a Viking army and reconquered Novgorod and Kiev from Yaropolk. As Prince of Kiev, Vladimir's most notable achievement was the Christianization of Kievan Rus', a process that began in 988. The Primary Chronicle states that when Vladimir had decided to accept a new faith instead of the traditional idol-worship (paganism) of the Slavs, he sent out some of his most valued advisors and warriors as emissaries to different parts of Europe. They visited the Christians of the Latin Rite, the Jews, and the Muslims before finally arriving in Constantinople. They rejected Islam because, among other things, it prohibited the consumption of alcohol, and Judaism because the god of the Jews had permitted his chosen people to be deprived of their country. They found the ceremonies in the Roman church to be dull. But at Constantinople, they were so astounded by the beauty of the cathedral of Hagia Sophia and the liturgical service held there that they made up their minds there and then about the faith they would like to follow. Upon their arrival home, they convinced Vladimir that the faith of the Byzantine Rite was the best choice of all, upon which Vladimir made a journey to Constantinople and arranged to marry Princess Anna, the sister of Byzantine emperor Basil II.
Is there an answer to this question: In 976, where did Vladimir have to flee to?

Answer:
Scandinavia