Input: Read this: The majority of the world's airports are non-towered, with no air traffic control presence. Busy airports have air traffic control (ATC) system. All airports use a traffic pattern to assure smooth traffic flow between departing and arriving aircraft. There are a number of aids available to pilots, though not all airports are equipped with them. Many airports have lighting that help guide planes using the runways and taxiways at night or in rain, snow, or fog. In the U.S. and Canada, the vast majority of airports, large and small, will either have some form of automated airport weather station, a human observer or a combination of the two. Air safety is an important concern in the operation of an airport, and airports often have their own safety services.
Question: What do all pilots use?

Output: unanswerable


QUES: Although professional wrestling in Mexico (lucha libre) also has stories and characters, they are less emphasized. Wrestlers in Mexico are traditionally more agile and perform more aerial maneuvers than professional wrestlers in the U.S. who, more often, rely on power moves and strikes to subdue their opponents. The difference in styles is due to the independent evolution of the sport in Mexico beginning in the 1930s and the fact that wrestlers in the cruiserweight division (peso semicompleto) are often the most popular wrestlers in Mexican lucha libre. Wrestlers often execute high flying moves characteristic of lucha libre by utilizing the wrestling ring's ropes to catapult themselves towards their opponents, using intricate combinations in rapid-fire succession, and applying complex submission holds. Lucha libre is also known for its tag team wrestling matches, in which the teams are often made up of three members, instead of two as is common in the U.S.

How are Mexican wrestlers different? 
What is the answer?
ANS: more agile and perform more aerial maneuvers


QUES: SVCD has two-thirds the resolution of DVD, and over 2.7 times the resolution of VCD. One CD-R disc can hold up to 60 minutes of standard quality SVCD-format video. While no specific limit on SVCD video length is mandated by the specification, one must lower the video bit rate, and therefore quality, to accommodate very long videos. It is usually difficult to fit much more than 100 minutes of video onto one SVCD without incurring significant quality loss, and many hardware players are unable to play video with an instantaneous bit rate lower than 300 to 600 kilobits per second.
How much can a VCD hold?

ANS: unanswerable


Near the end of the first decade of the double-Bills' guidance, the Cubs won the NL pennant in 1929 and then achieved the unusual feat of winning a pennant every three years, following up the 1929 flag with league titles in 1932, 1935, and 1938. Unfortunately, their success did not extend to the Fall Classic, as they fell to their AL rivals each time. The '32 series against the Yankees featured Babe Ruth's "called shot" at Wrigley Field in Game 3. There were some historic moments for the Cubs as well; In 1930, Hack Wilson, one of the top home run hitters in the game, had one of the most impressive seasons in MLB history, hitting 56 home runs and establishing the current runs-batted-in record of 191. That 1930 club, which boasted six eventual Hall of Famers (Wilson, Gabby Hartnett, Rogers Hornsby, George "High Pockets" Kelly, Kiki Cuyler and manager Joe McCarthy) established the current team batting average record of .309. In 1935 the Cubs claimed the pennant in thrilling fashion, winning a record 21 games in a row in September. The '38 club saw Dizzy Dean lead the team's pitching staff and provided a historic moment when they won a crucial late-season game at Wrigley Field over the Pittsburgh Pirates with a walk-off home run by Gabby Hartnett, which became known in baseball lore as "The Homer in the Gloamin'".
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many games in a row did the Cubs win in a row during 1935?
Ah, so.. 21


Question: Very small lamps may have the filament support wires extended through the base of the lamp, and can be directly soldered to a printed circuit board for connections. Some reflector-type lamps include screw terminals for connection of wires. Most lamps have metal bases that fit in a socket to support the lamp and conduct current to the filament wires. In the late 19th century, manufacturers introduced a multitude of incompatible lamp bases. General Electric introduced standard base sizes for tungsten incandescent lamps under the Mazda trademark in 1909. This standard was soon adopted across the US, and the Mazda name was used by many manufacturers under license through 1945. Today most incandescent lamps for general lighting service use an Edison screw in candelabra, intermediate, or standard or mogul sizes, or double contact bayonet base. Technical standards for lamp bases include ANSI standard C81.67 and IEC standard 60061-1 for common commercial lamp sizes, to ensure interchangeablitity between different manufacturer's products. Bayonet base lamps are frequently used in automotive lamps to resist loosening due to vibration. A bipin base is often used for halogen or reflector lamps.
Try to answer this question if possible: What is the typical base type for halogen lamps?
Answer: bipin base


Input: Read this: The PV industry has seen drops in module prices since 2008. In late 2011, factory-gate prices for crystalline-silicon photovoltaic modules dropped below the $1.00/W mark. The $1.00/W installed cost, is often regarded in the PV industry as marking the achievement of grid parity for PV. These reductions have taken many stakeholders, including industry analysts, by surprise, and perceptions of current solar power economics often lags behind reality. Some stakeholders still have the perspective that solar PV remains too costly on an unsubsidized basis to compete with conventional generation options. Yet technological advancements, manufacturing process improvements, and industry re-structuring, mean that further price reductions are likely in coming years.
Question: The PV industry has seen drops in module prices since what year?

Output:
2008