Article: Just as the navigational approach would require programs to loop in order to collect records, the relational approach would require loops to collect information about any one record. Codd's solution to the necessary looping was a set-oriented language, a suggestion that would later spawn the ubiquitous SQL. Using a branch of mathematics known as tuple calculus, he demonstrated that such a system could support all the operations of normal databases (inserting, updating etc.) as well as providing a simple system for finding and returning sets of data in a single operation.

Question: What type of math was used to create a system to find data sets?
Ans: tuple calculus

Article: The record transfer fee for a Premier League player has risen steadily over the lifetime of the competition. Prior to the start of the first Premier League season Alan Shearer became the first British player to command a transfer fee of more than 3 million. The record rose steadily in the Premier League's first few seasons, until Alan Shearer made a record breaking 15 million move to Newcastle United in 1996. The three highest transfer in the sport's history had a Premier League club on the selling end, with Tottenham Hotspur selling Gareth Bale to Real Madrid for 85 million in 2013, Manchester United's sale of Cristiano Ronaldo to Real Madrid for 80 million in 2009, and Liverpool selling Luis Suarez to Barcelona for 75 million in 2014.

Question: Who was the first British player in the Premier League to receive a transfer fee greater than 3 million?
Ans: Alan Shearer

Article: Murdoch has responded to some of the arguments against the newspaper by saying that critics are "snobs" who want to "impose their tastes on everyone else", while MacKenzie claims the same critics are people who, if they ever had a "popular idea", would have to "go and lie down in a dark room for half an hour". Both have pointed to the huge commercial success of the Sun in this period and its establishment as Britain's top-selling newspaper, claiming that they are "giving the public what they want". This conclusion is disputed by critics. John Pilger has said that a late-1970s edition of the Daily Mirror, which replaced the usual celebrity and domestic political news items with an entire issue devoted to his own front-line reporting of the genocide in Pol Pot's Cambodia, not only outsold The Sun on the day it was issued but became the only edition of the Daily Mirror to ever sell every single copy issued throughout the country, something never achieved by The Sun.

Question: How did Murdoch describe critics of his newspaper?
Ans: "snobs" who want to "impose their tastes on everyone else"

Article: In Canada, "the 51st state" is a phrase generally used in such a way as to imply that if a certain political course is taken, Canada's destiny will be as little more than a part of the United States. Examples include the Canada-United States Free Trade Agreement in 1988, the debate over the creation of a common defense perimeter, and as a potential consequence of not adopting proposals intended to resolve the issue of Quebec sovereignty, the Charlottetown Accord in 1992 and the Clarity Act in 1999.

Question: When did the Clarity Act go into effect?
Ans:
1999