Instructions: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Input: Context: Nordisk familjebok (Swedish: (nusk famljbuk), Nordic Family Book) is a Swedish encyclopedia that was published in print form between 1876 and 1957, and that is now fully available in digital form via Project Runeberg at Linkoping University.
Question: On what date did Nordisk familjebok end?
Output:
1957