Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Example Input: German academics believe they have solved the centuries-old mystery of the "Mona Lisa" in Leonardo ad Vinci's famous portrait . Lisa Gherardini, the wife of a wealthy Florentine merchant, Francesco del Giocondo, has long been seen as the most likely model for the sixteenth-century painting. Art historians have wondered whether the smiling woman may actually have been da Vinci's lover or mother, or the artist himself. Now experts at the prefix = st1 /HeidelbergUniversitylibrary say old notes made in a book by its owner in October, 1503, confirm that Lisa del Giocondo was indeed the model for the famous portrait in the world. "All doubts about the identity of the Mona Lisa have been removed by a discovery by Dr. Armin Schlechter," the library said in a statement on Monday. "Until then, only 'scant evidence' from sixteenth-century documents had been available. These had left lots of room for doubt, and many different identities were put forward." The comments compare Leonardo to the ancient Greek artist Apelles, and say he was working on three paintings at that time, one of which was a portrait of Lisa del Giocondo. Art experts say the Heidelbergdiscovery is a break-through, and the earliest mention linking the merchant's wife to the portrait. Before this discovery the earliest link dated from around 1550, and was made by Italian official Giorgio Vasari, the library said, adding that there had been doubts about Vasari's reliability. The Heidelbergnotes were actually discovered over two year's ago in the library by Schlechter, a spokeswoman said. Although the findings were published in the library's catalogue, they were not widely publicized, and received little attention until a German broadcaster decided to do some recording there, she said.
Example Output: Who discovered the Heidelbergnotes?

Example Input: The SET domain contains the catalytic center of lysine methyltransferases that target the N-terminal tails of histones and regulate chromatin function. Here we report the structure of the SET7/9 protein in the absence and presence of its cofactor product, S-adenosyl-L-homocysteine (AdoHcy). A knot within the SET domain helps form the methyltransferase active site, where AdoHcy binds and lysine methylation is likely to occur. A structure-guided comparison of sequences within the SET protein family suggests that the knot substructure and active site environment are conserved features of the SET domain.
Example Output: What is the characteristic domain of histone methyltransferases?

Example Input: It was in 1865 that two Frenchmen were looking into the future. Edouard de Laboulaye, who studied history, admired the United States greatly. Frederic Auguste Bartholdi was a famous artist. De Laboulaye was thinking about 1876, when the country he respected so much would celebrate its 100th birthday. What gift would be good enough for the people of France to give? Right away, Bartholdi thought of a giant statue. Bartholdi kept thinking about a statue for several years. Then, in 1871, he visited the United States and saw the perfect place for a huge statue. It was Bedloe's Island in New York. The project -- the Statue of Liberty -- got started almost immediately, and Bartholdi went home to France to begin work. However, the statue was not finished in time for the 100th birthday. The United States Congress approved the use of Bedloe's Island on February 22, 1877. During the 100th celebration in 1876, the arm of the statue that would hold the torch was shown in Philadelphia. In 1879 the huge head was put on display in France. For the face of the statue, Bartholdi used his mother as a model. The statue was finally completed in 1884. The work had been difficult enough, but then some really hard work began. The statue had to be taken apart and packed into boxes. It was not until May 1885 that the statue -- in pieces -- left France for its new home. The statue arrived in June. However, the Americans fell behind on their part of the project. They hadn't raised enough money for building the base of the statue. People wondered if the country really needed or wanted such a gift. Finally, though, the money was raised and the base was completed. The last piece of the statue was put in place on October 28, 1886.
Example Output:
How many years did it take for the Statue of Liberty to be put in place on its base after it was completed?