In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

[EX Q]: Ha Long Bay is located in northeastern Vietnam, from E106 ° 55' to E107 ° 37' and from N20 ° 43' to N21 ° 09'. The bay stretches from Yen Hung district, past Ha Long city, Cam Pha town to Van Don District, bordered on the south and southeast by Lan Ha Bay, on the north by Ha Long city, and on the west by Bai Tu Long Bay. The bay has a 120 km long coastline and is approximately 1,553 km2 in size with about 2,000 islets. The area designated by UNESCO as the World Natural Heritage Site incorporates 434 km2 with 775 islets, of which the core zone is delimited by 69 points: Dau Go island on the west, Ba Ham lake on the south and Cong Tay island on the east. The protected area is from the Cái Dăm petrol store to Quang Hanh commune, Cam Pha town and the surrounding zone.
[EX A]: is halong bay in north or south vietnam

[EX Q]: The United States Constitution provides for a federal government that is superior to state governments with regard to its enumerated powers. These powers include the authority to govern international affairs, interstate commerce, the currency and national defense. After the American Civil War, the Fourteenth Amendment applied the Constitution's Bill of Rights to state governments. Legislation passed by Congress, an Executive Order of the President, or a decision of federal courts pursuant to the Constitution are federal law.
[EX A]: who makes the federal laws in the united states

[EX Q]: Lunar distance (LD or Δ ⊕ L (\ textstyle \ Delta _ (\ oplus L))), also called Earth -- Moon distance, Earth -- Moon characteristic distance, or distance to the Moon, is a unit of measure in astronomy. It is the average distance from the center of Earth to the center of the Moon. More technically, it is the mean semi-major axis of the geocentric lunar orbit. It may also refer to the time-averaged distance between the centers of the Earth and the Moon, or less commonly, the instantaneous Earth -- Moon distance. The lunar distance is approximately a quarter of a million miles.
[EX A]:
what is the distance between earth and moon

