[Q]: Question: "What did the astronauts do after getting to the moon?"  Context: "On December 21, 1968, Frank Borman, James Lovell, and William Anders became the first humans to ride the Saturn V rocket into space on Apollo 8. They also became the first to leave low-Earth orbit and go to another celestial body, and entered lunar orbit on December 24. They made ten orbits in twenty hours, and transmitted one of the most watched TV broadcasts in history, with their Christmas Eve program from lunar orbit, that concluded with a reading from the biblical Book of Genesis. Two and a half hours after the broadcast, they fired their engine to perform the first trans-Earth injection to leave lunar orbit and return to the Earth. Apollo 8 safely landed in the Pacific ocean on December 27, in NASA's first dawn splashdown and recovery."  Answer:
****
[A]: made ten orbits in twenty hours, and transmitted one of the most watched TV broadcasts in history


[Q]: Question: "What uses a vacuum on top of the cab?"  Context: "A elevator of this kind uses a vacuum on top of the cab and a valve on the top of the "shaft" to move the cab upwards and closes the valve in order to keep the cab at the same level. a diaphragm or a piston is used as a "brake" if there's a sudden increase in pressure avove the cab. however, to go down, it opens the valve so that the air can pressurize the top of the "shaft", allowing the cab to go down by its own weight. this also means that in case of a power failure, the cab will automatically go down. the "shaft" is made of acrilic, is always round, due to the shape of the vacuum pump turbine. in order to keep the air inside of the cab, rubber seals are used. due to technical limitations, these elevators have a low capacity. they usually allow 1-3 passengers and up to 525 lbs."  Answer:
****
[A]: A elevator of this kind


[Q]: Question: "What situations are climbing elevators typically used in?"  Context: "A climbing elevator is a self-ascending elevator with its own propulsion. The propulsion can be done by an electric or a combustion engine. Climbing elevators are used in guyed masts or towers, in order to make easy access to parts of these constructions, such as flight safety lamps for maintenance. An example would be the Moonlight towers in Austin, Texas, where the elevator holds only one person and equipment for maintenance. The Glasgow Tower — an observation tower in Glasgow, Scotland — also makes use of two climbing elevators."  Answer:
****
[A]: constructions


[Q]: Question: "What museum attractions came in behind the Louvre?"  Context: "There were 72.1 million visitors to the city's museums and monuments in 2013. The city's top tourist attraction was the Notre Dame Cathedral, which welcomed 14 million visitors in 2013. The Louvre museum had more than 9.2 million visitors in 2013, making it the most visited museum in the world. The other top cultural attractions in Paris in 2013 were the Basilique du Sacré-Cœur (10.5 million visitors); the Eiffel Tower (6,740,000 visitors); the Centre Pompidou (3,745,000 visitors) and Musée d'Orsay (3,467,000 visitors). In the Paris region, Disneyland Paris, in Marne-la-Vallée, 32 km (20 miles) east of the centre of Paris, was the most visited tourist attraction in France, with 14.9 million visitors in 2013."  Answer:
****
[A]:
Centre Pompidou (3,745,000 visitors) and Musée d'Orsay