Given the task definition, example input & output, solve the new input case.
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: 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.
Output: who has the maximum number of followers on instagram
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.

New input case for you: During the 19th century the symbol began to proliferate among the Jewish communities of Eastern Europe, ultimately being used among the Jewish communities in the Pale of Settlement. A significant motivating factor, according to scholar Gershom Sholem, was the desire to represent Jewish religion and / or identity in the same manner the Christian cross identified that religion's believers. The earliest Jewish usage of the symbol was inherited from medieval Arabic literature by Kabbalists for use in talismanic protective amulets (segulot) where it was known as a Seal of Solomon. The symbol was also used in Christian churches as a decorative motif many centuries before its first known use in a Jewish synagogue. Before the 19th century, official use in Jewish communities was generally known only in the region of today's Czech Republic, Austria and possibly parts of Southern Germany, having begun in medieval Prague.
Output:
what is the star of david used for