Please answer this: Extract the answer to the question from the following context. Question: Who ruled over Great Britain according to text? Context: The Greco-Egyptian scientist Claudius Ptolemy referred to the larger island as great Britain ( - megalis Brettanias) and to Ireland as little Britain ( - mikris Brettanias) in his work Almagest (147148 AD). In his later work, Geography (c. 150 AD), he gave these islands the names Alwion, Iwernia, and Mona (the Isle of Man), suggesting these may have been names of the individual islands not known to him at the time of writing Almagest. The name Albion appears to have fallen out of use sometime after the Roman conquest of Great Britain, after which Britain became the more commonplace name for the island called Great Britain.
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Answer: Roman

Please answer this: Extract the answer to the question from the following context. Question: When did the predecessor of Mswati III's mother become the ruler of Swaziland? Context: Following the elections of 1973, the constitution of Swaziland was suspended by King Sobhuza II who thereafter ruled the country by decree until his death in 1982. At this point Sobhuza II had ruled Swaziland for 61 years, making him the longest ruling monarch in history. A regency followed his death, with Queen Regent Dzeliwe Shongwe being head of state until 1984 when she was removed by Liqoqo and replaced by Queen Mother Ntfombi Tfwala. Mswati III, the son of Ntfombi, was crowned king on 25 April 1986 as King and Ingwenyama of Swaziland.
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Answer: 1982

Please answer this: Extract the answer to the question from the following context. Question: What is an important aspect of a solar balloon to function? Context: A solar balloon is a black balloon that is filled with ordinary air. As sunlight shines on the balloon, the air inside is heated and expands causing an upward buoyancy force, much like an artificially heated hot air balloon. Some solar balloons are large enough for human flight, but usage is generally limited to the toy market as the surface-area to payload-weight ratio is relatively high.
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Answer:
filled with ordinary air