Input: Read this: In 1872, Russian Alexander Lodygin invented an incandescent light bulb and obtained a Russian patent in 1874. He used as a burner two carbon rods of diminished section in a glass receiver, hermetically sealed, and filled with nitrogen, electrically arranged so that the current could be passed to the second carbon when the first had been consumed. Later he lived in the USA, changed his name to Alexander de Lodyguine and applied and obtained patents for incandescent lamps having chromium, iridium, rhodium, ruthenium, osmium, molybdenum and tungsten filaments, and a bulb using a molybdenum filament was demonstrated at the world fair of 1900 in Paris.
Question: When did Anxander Lodygin change his name?

Output: unanswerable

Input: Read this: In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated).
Question: In 2008, the XinHuang News Agency reported the resolution of the BeiDou System as how high?

Output: unanswerable

Input: Read this: The judges continue in paragraph 12, "The determination of when the targeted part is substantial enough to meet this requirement may involve a number of considerations. The numeric size of the targeted part of the group is the necessary and important starting point, though not in all cases the ending point of the inquiry. The number of individuals targeted should be evaluated not only in absolute terms, but also in relation to the overall size of the entire group. In addition to the numeric size of the targeted portion, its prominence within the group can be a useful consideration. If a specific part of the group is emblematic of the overall group, or is essential to its survival, that may support a finding that the part qualifies as substantial within the meaning of Article 4 [of the Tribunal's Statute]."
Question: What is the necessary emblematic?

Output: unanswerable

Input: Read this: AFL Global and Ganlan Media were created in 2012 by businessman Martin E. Judge, founder and owner of the Judge Group. The company, called AFL Global, LLC, looks to introduce and launch professional Arena Football teams and franchises in various locations throughout the world (like NFL Europe). After their successful trip to China to help promote the game, they formally announced plans to further develop AFL China by the fall of 2014 by starting a comprehensive training program in May 2013 with exhibition games planned for the cities of Beijing and Guangzhou in October. This is the first time professional football of any kind will be played in China with the support of the Chinese government and the CRFA (Chinese Rugby Football Association). Key persons involved include founder and CEO. Martin E. Judge, partner Ron Jaworski, CAFL CEO Gary Morris and president David Niu. Ganlan Media has since dropped this name and will carry the league's name as its corporate identity.
Question: Who is the Chief Executive Officer of the China American Football League?

Output:
Gary Morris