Detailed 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.
Q: Context: The 12th Congress of the Russian Communist Party (Bolsheviks) was held during 17--25 April 1923 in Moscow.
Question: On what date did 12th Congress of the Russian Communist Party (Bolsheviks) end?
A:
25 april 1923