Article: Scientific and critical editions can be protected by copyright as works of authorship if enough creativity/originality is provided. The mere addition of a word, or substitution of a term with another one believed to be more correct, usually does not achieve such level of originality/creativity. All the notes accounting for the analysis and why and how such changes have been made represent a different work autonomously copyrightable if the other requirements are satisfied. In the European Union critical and scientific editions may be protected also by the relevant neighboring right that protects critical and scientific publications of public domain works as made possible by art. 5 of the Copyright Term Directive. Not all EU member States have transposed art. 5 into national law.

Question: What minor things can be included and not invalidate a copyright?
Ans: The mere addition of a word, or substitution of a term with another one believed to be more correct

Article: Another aspect of anti-aircraft defence was the use of barrage balloons to act as physical obstacle initially to bomber aircraft over cities and later for ground attack aircraft over the Normandy invasion fleets. The balloon, a simple blimp tethered to the ground, worked in two ways. Firstly, it and the steel cable were a danger to any aircraft that tried to fly among them. Secondly, to avoid the balloons, bombers had to fly at a higher altitude, which was more favorable for the guns. Barrage balloons were limited in application, and had minimal success at bringing down aircraft, being largely immobile and passive defences.

Question: What acted as a physical obstacle to anti-aircraft defence?
Ans: barrage balloons

Article: In March 2006, it was revealed by the Archivist of the United States in a public hearing that a memorandum of understanding between NARA and various government agencies existed to "reclassify", i.e., withdraw from public access, certain documents in the name of national security, and to do so in a manner such that researchers would not be likely to discover the process (the U.S. reclassification program). An audit indicated that more than one third withdrawn since 1999 did not contain sensitive information. The program was originally scheduled to end in 2007.

Question: How was the reclassification of documents in '06 revealed?
Ans: public hearing

Article: TCM's film content has remained mostly uncut and uncolorized (with films natively filmed or post-produced in the format being those only ones presented in color), depending upon the original content of movies, particularly movies released after the 1968 implementation of the Motion Picture Association of America's ratings system and the concurrent disestablishment of the Motion Picture Production Code. Because of this, TCM is formatted similarly to a premium channel with certain films particularly those made from the 1960s onward sometimes featuring nudity, sexual content, violence and/or strong profanity; the network also features rating bumpers prior to the start of a program (most programs on TCM, especially films, are rated for content using the TV Parental Guidelines, in lieu of the MPAA's rating system).

Question: In what year did the Motion Picture Production Code cease?
Ans:
1968