Input: Article: The most accurate timekeeping devices are atomic clocks, which are accurate to seconds in many millions of years, and are used to calibrate other clocks and timekeeping instruments. Atomic clocks use the frequency of electronic transitions in certain atoms to measure the second. One of the most common atoms used is caesium, most modern atomic clocks probe caesium with microwaves to determine the frequency of these electron vibrations. Since 1967, the International System of Measurements bases its unit of time, the second, on the properties of caesium atoms. SI defines the second as 9,192,631,770 cycles of the radiation that corresponds to the transition between two electron spin energy levels of the ground state of the 133Cs atom.

Now answer this question: Which system bases its unit of time on the properties of caesium?

Output: the International System of Measurements

Input: Article: The value of the deposit was obvious from the start, but the means of extracting the bitumen were not. The nearest town, Fort McMurray, Alberta was a small fur trading post, other markets were far away, and transportation costs were too high to ship the raw bituminous sand for paving. In 1915, Sidney Ells of the Federal Mines Branch experimented with separation techniques and used the bitumen to pave 600 feet of road in Edmonton, Alberta. Other roads in Alberta were paved with oil sands, but it was generally not economic. During the 1920s Dr. Karl A. Clark of the Alberta Research Council patented a hot water oil separation process and entrepreneur Robert C. Fitzsimmons built the Bitumount oil separation plant, which between 1925 and 1958 produced up to 300 barrels (50 m3) per day of bitumen using Dr. Clark's method. Most of the bitumen was used for waterproofing roofs, but other uses included fuels, lubrication oils, printers ink, medicines, rust and acid-proof paints, fireproof roofing, street paving, patent leather, and fence post preservatives. Eventually Fitzsimmons ran out of money and the plant was taken over by the Alberta government. Today the Bitumount plant is a Provincial Historic Site.

Now answer this question: Who constructed the Bitumont oil separation plant?

Output: Robert C. Fitzsimmons

Input: Article: The Free Officers' intention was not to install themselves in government, but to re-establish a parliamentary democracy. Nasser did not believe that a low-ranking officer like himself (a lieutenant colonel) would be accepted by the Egyptian people, and so selected General Naguib to be his "boss" and lead the coup in name. The revolution they had long sought was launched on 22 July and was declared a success the next day. The Free Officers seized control of all government buildings, radio stations, and police stations, as well as army headquarters in Cairo. While many of the rebel officers were leading their units, Nasser donned civilian clothing to avoid detection by royalists and moved around Cairo monitoring the situation. In a move to stave off foreign intervention two days before the revolution, Nasser had notified the American and British governments of his intentions, and both had agreed not to aid Farouk. Under pressure from the Americans, Nasser had agreed to exile the deposed king with an honorary ceremony.

Now answer this question: What did Nasser wear during the coup?

Output:
civilian clothing