This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Example: Passage: The French and Indian War (17541763) was the North American theater of the worldwide Seven Years' War. The war was fought between the colonies of British America and New France, with both sides supported by military units from their parent countries of Great Britain and France, as well as Native American allies. At the start of the war, the French North American colonies had a population of roughly 60,000 European settlers, compared with 2 million in the British North American colonies. The outnumbered French particularly depended on the Indians. Long in conflict, the metropole nations declared war on each other in 1756, escalating the war from a regional affair into an intercontinental conflict. Question: When was the French and Indian War?
Example solution: 1754-1763
Example explanation: It is a common convention to write (start year-end year) beside a historical event to understand when the event happened. We can observe a similar notation from the passage to conclude that the French and Indian War happened during 17541763. Therefore, the answer is 17541763.

Problem: Passage: New York City is home to hundreds of cultural institutions and historic sites, many of which are internationally known. Museum Mile is the name for a section of Fifth Avenue running from 82nd to 105th streets on the Upper East Side of Manhattan, in an area sometimes called Upper Carnegie Hill. The Mile, which contains one of the densest displays of culture in the world, is actually three blocks longer than one mile (1.6 km). Ten museums occupy the length of this section of Fifth Avenue. The tenth museum, the Museum for African Art, joined the ensemble in 2009, however its Museum at 110th Street, the first new museum constructed on the Mile since the Guggenheim in 1959, opened in late 2012. In addition to other programming, the museums collaborate for the annual Museum Mile Festival, held each year in June, to promote the museums and increase visitation. Many of the world's most lucrative art auctions are held in New York City. Question: When was the Guggenheim built?
Solution: 1959