Input: Read this: There is an extensive network of caves, including Wookey Hole, underground rivers, and gorges, including the Cheddar Gorge and Ebbor Gorge. The county has many rivers, including the Axe, Brue, Cary, Parrett, Sheppey, Tone and Yeo. These both feed and drain the flat levels and moors of mid and west Somerset. In the north of the county the River Chew flows into the Bristol Avon. The Parrett is tidal almost to Langport, where there is evidence of two Roman wharfs. At the same site during the reign of King Charles I, river tolls were levied on boats to pay for the maintenance of the bridge.
Question: What is the name of one of Somerset's underground rivers?

Output: unanswerable

QUES: In September 2003, a new type of blue LED was demonstrated by Cree that consumes 24 mW at 20 milliamperes (mA). This produced a commercially packaged white light giving 65 lm/W at 20 mA, becoming the brightest white LED commercially available at the time, and more than four times as efficient as standard incandescents. In 2006, they demonstrated a prototype with a record white LED luminous efficacy of 131 lm/W at 20 mA. Nichia Corporation has developed a white LED with luminous efficacy of 150 lm/W at a forward current of 20 mA. Cree's XLamp XM-L LEDs, commercially available in 2011, produce 100 lm/W at their full power of 10 W, and up to 160 lm/W at around 2 W input power. In 2012, Cree announced a white LED giving 254 lm/W, and 303 lm/W in March 2014. Practical general lighting needs high-power LEDs, of one watt or more. Typical operating currents for such devices begin at 350 mA.

In what year was a new type of red LED produced?
What is the answer?
ANS: unanswerable

QUES: The 548 ft (167 m) City Hall remained the tallest building in the city until 1987 when One Liberty Place was constructed. Numerous glass and granite skyscrapers were built in Philadelphia's Center City from the late 1980s onwards. In 2007, the Comcast Center surpassed One Liberty Place to become the city's tallest building. The Comcast Innovation and Technology Center is under construction in Center City and is planned to reach a height of 1,121 feet (342 meters); upon completion, the tower is expected to be the tallest skyscraper in the United States outside of New York City and Chicago.
How tall is the City Hall?

ANS: 548 ft

The key advantage of the four-rail system is that neither running rail carries any current. This scheme was introduced because of the problems of return currents, intended to be carried by the earthed (grounded) running rail, flowing through the iron tunnel linings instead. This can cause electrolytic damage and even arcing if the tunnel segments are not electrically bonded together. The problem was exacerbated because the return current also had a tendency to flow through nearby iron pipes forming the water and gas mains. Some of these, particularly Victorian mains that predated London's underground railways, were not constructed to carry currents and had no adequate electrical bonding between pipe segments. The four-rail system solves the problem. Although the supply has an artificially created earth point, this connection is derived by using resistors which ensures that stray earth currents are kept to manageable levels. Power-only rails can be mounted on strongly insulating ceramic chairs to minimise current leak, but this is not possible for running rails which have to be seated on stronger metal chairs to carry the weight of trains. However, elastomeric rubber pads placed between the rails and chairs can now solve part of the problem by insulating the running rails from the current return should there be a leakage through the running rails.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What does not have to be seated on stronger metal chairs?
Ah, so.. unanswerable

Question: In 1907, the newly established Board of Education found that greater capacity for higher technical education was needed and a proposal to merge the City and Guilds College, the Royal School of Mines and the Royal College of Science was approved and passed, creating The Imperial College of Science and Technology as a constituent college of the University of London. Imperial's Royal Charter, granted by Edward VII, was officially signed on 8 July 1907. The main campus of Imperial College was constructed beside the buildings of the Imperial Institute in South Kensington.
Try to answer this question if possible: When the merger was passed, what constituent college was created?
Answer: The Imperial College of Science and Technology

Input: Read this: Beyonce has worked with Pepsi since 2002, and in 2004 appeared in a Gladiator-themed commercial with Britney Spears, Pink, and Enrique Iglesias. In 2012, Beyonce signed a $50 million deal to endorse Pepsi. The Center for Science in the Public Interest (CSPINET) wrote Beyonce an open letter asking her to reconsider the deal because of the unhealthiness of the product and to donate the proceeds to a medical organisation. Nevertheless, NetBase found that Beyonce's campaign was the most talked about endorsement in April 2013, with a 70 per cent positive audience response to the commercial and print ads.
Question: Pepsi paid Beyonce how much in 2012 for her endorsement?

Output:
50 million