Question: The most familiar, and historically the oldest, types of glass are "silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand. The term glass, in popular usage, is often used to refer only to this type of material, which is familiar from use as window glass and in glass bottles. Of the many silica-based glasses that exist, ordinary glazing and container glass is formed from a specific type called soda-lime glass, composed of approximately 75% silicon dioxide (SiO2), sodium oxide (Na2O) from sodium carbonate (Na2CO3), calcium oxide, also called lime (CaO), and several minor additives. A very clear and durable quartz glass can be made from pure silica, but the high melting point and very narrow glass transition of quartz make glassblowing and hot working difficult. In glasses like soda lime, the compounds added to quartz are used to lower the melting temperature and improve workability, at a cost in the toughness, thermal stability, and optical transmittance.
Is there an answer to this question: What kind of glass are windows made from?

Answer: unanswerable

Question: In China, it opened on 12 November and earned $15 million on its opening day, which is the second biggest 2D single day gross for a Hollywood film behind the $18.5 million opening day of Mission: Impossible Rogue Nation and occupying 43% of all available screens which included $790,000 in advance night screenings. Through its opening weekend, it earned $48.1 million from 14,700 screens which is 198% ahead of Skyfall, a new record for a Hollywood 2D opening. IMAX contributed $4.6 million on 246 screens, also a new record for a three-day opening for a November release (breaking Interstellar's record). In its second weekend, it added $12.1 million falling precipitously by 75% which is the second worst second weekend drop for any major Hollywood release in China of 2015. It grossed a total of $84.7 million there after four weekends. Albeit a strong opening it failed to attain the $100 million mark as projected.
Is there an answer to this question: The film fell by 85% in its second weekend in what country?

Answer: unanswerable

Question: Although inefficient, incandescent light bulbs have an advantage in applications where accurate color reproduction is important, since the continuous blackbody spectrum emitted from an incandescent light-bulb filament yields near-perfect color rendition, with a color rendering index of 100 (the best possible). White-balancing is still required to avoid too "warm" or "cool" colors, but this is a simple process that requires only the color temperature in Kelvin as input for modern, digital visual reproduction equipment such as video or still cameras unless it is completely automated. The color-rendering performance of incandescent lights cannot be matched by LEDs or fluorescent lights, although they can offer satisfactory performance for non-critical applications such as home lighting. White-balancing such lights is therefore more complicated, requiring additional adjustments to reduce for example green-magenta color casts, and even when properly white-balanced, the color reproduction will not be perfect.
Is there an answer to this question: What does not have an advantage in applications where color reproduction is important?

Answer: unanswerable

Question: NARA also maintains the Presidential Library system, a nationwide network of libraries for preserving and making available the documents of U.S. presidents since Herbert Hoover. The Presidential Libraries include:
Is there an answer to this question: What is the system that preserves the documents of US Presidents?

Answer:
Presidential Library system