Question: Local associations of a special kind are an amalgamation of one or more Landkreise with one or more Kreisfreie Städte to form a replacement of the aforementioned administrative entities at the district level. They are intended to implement simplification of administration at that level. Typically, a district-free city or town and its urban hinterland are grouped into such an association, or Kommunalverband besonderer Art. Such an organization requires the issuing of special laws by the governing state, since they are not covered by the normal administrative structure of the respective states.
Try to answer this question if possible: What are local associations  intended to implement?
Answer: simplification of administration
Question: The Air Commerce Act of May 20, 1926, is the cornerstone of the federal government's regulation of civil aviation. This landmark legislation was passed at the urging of the aviation industry, whose leaders believed the airplane could not reach its full commercial potential without federal action to improve and maintain safety standards. The Act charged the Secretary of Commerce with fostering air commerce, issuing and enforcing air traffic rules, licensing pilots, certifying aircraft, establishing airways, and operating and maintaining aids to air navigation. The newly created Aeronautics Branch, operating under the Department of Commerce assumed primary responsibility for aviation oversight.
Try to answer this question if possible: What department did the Aeronautic Branch create?
Answer: unanswerable
Question: 
 Turkey: The torch relay leg in Istanbul, held on April 3, started on Sultanahmet Square and finished in Taksim Square. Uyghurs living in Turkey protested at Chinese treatment of their compatriots living in Xinjiang. Several protesters who tried to disrupt the relay were promptly arrested by the police.
Try to answer this question if possible: Who protested for their compatriots who were in Xinjiang?
Answer: Uyghurs living in Turkey
Question: Glass has the ability to refract, reflect, and transmit light following geometrical optics, without scattering it. It is used in the manufacture of lenses and windows. Common glass has a refraction index around 1.5. This may be modified by adding low-density materials such as boron, which lowers the index of refraction (see crown glass), or increased (to as much as 1.8) with high-density materials such as (classically) lead oxide (see flint glass and lead glass), or in modern uses, less toxic oxides of zirconium, titanium, or barium. These high-index glasses (inaccurately known as "crystal" when used in glass vessels) cause more chromatic dispersion of light, and are prized for their diamond-like optical properties.
Try to answer this question if possible: What can be used to make glass less refractive?
Answer:
boron