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.

Example input: This list contains the top 25 accounts with the most followers on the social photo-sharing platform Instagram. As of May 2018, the most followed user is Instagram's own account, with over 235 million followers. Selena Gomez is the most followed individual, with over 137 million followers. Ten accounts have exceeded 100 million followers on the site.
Example output: who has the maximum number of followers on instagram
Example explanation: The answer is talking about the Instagram accounts that have the most followers. The question asking about the maximum number of followers. So this is a good example.
Q: The world's first movable type printing press technology for printing paper books was made of porcelain materials and was invented around AD 1040 in China during the Northern Song Dynasty by the inventor Bi Sheng (990 -- 1051). Subsequently in 1377, the world's oldest extant movable metal print book, Jikji, was printed in Korea during the Goryeo dynasty. Because of this, the diffusion of both movable-type systems was, to some degree, limited to primarily East Asia, although various sporadic reports of movable type technology were brought back to Europe by Christian missionaries, traders and business people who were returning to Europe after having worked in China for several years and influenced the development of printing technology in Europe. Some of these medieval European accounts are still preserved in the library archives of the Vatican and Oxford University among many others. Around 1450 Johannes Gutenberg, introduced the metal movable-type printing press in Europe, along with innovations in casting the type based on a matrix and hand mould. The small number of alphabetic characters needed for European languages was an important factor. Gutenberg was the first to create his type pieces from an alloy of lead, tin, and antimony -- and these materials remained standard for 550 years.
A:
who is given credit for inventing the printing press