Problem: Some countries were not included for various reasons, such as being a non-UN member, unable, or unwilling to provide the necessary data at the time of publication. Besides the states with limited recognition, the following states were also not included.
Why were all countries included?
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Answer: unanswerable

Problem: After the grant of the royal charter it had become known as the Royal Institute of British Architects in London, eventually dropping the reference to London in 1892. In 1934, it moved to its current headquarters on Portland Place, with the building being opened by King George V and Queen Mary.
Who opened the structure in which the Royal Institute is currently housed?
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Answer: King George V and Queen Mary

Problem: The Seahawks' CenturyLink Field has hosted NFL playoff games in 2006, 2008, 2011, 2014 and 2015. The Seahawks have advanced to the Super Bowl three times: 2005, 2013 and 2014. They defeated the Denver Broncos 43-8 to win their first Super Bowl championship in Super Bowl XLVIII, but lost 24-28 against the New England Patriots in Super Bowl XLIX. Seattle Sounders FC has played in Major League Soccer since 2009, sharing CenturyLink Field with the Seahawks, as a continuation of earlier teams in the lower divisions of American soccer. The Sounders have not won the MLS Cup but have, however, won the MLS Supporters' Shield in 2014 and the Lamar Hunt U.S. Open Cup on four occasions: 2009, 2010, 2011, and 2014.
What is the Seattle soccer club named?
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Answer:
Seattle Sounders FC