Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Billionaire Prince Alwaleed bin Talal  was picked up at  his  desert camp  the senior official said. Authorities did not disclose the evidence that prompted the arrests.
 Prince Alwaleed bin Talal  presides over a vast financial empire (estimated $35 billion in 2015):
Alwaleed is the largest individual shareholder of Citigroup  the second-largest voting shareholder in 21st Century Fox and owns a number of hotels. TIME even called  him  "Arabian Warren Buffet".
MBS  as  the Crown Prince  is known  is the leader who is launching what modernizers hope will be a Saudi Version of the Meiji Restoration[ii] in Japan  transforming the political economy and culture out of necessity â in order to survive in the modern world system. The Saudis have practiced religious and cultural isolationism  while their oil allowed the country to avoid the necessity of building an economy that could supply anything else that the rest of the world would be willing to pay for.
Of the people arrested   Alwaleed bin Tala  is the most intriguing for Americans thanks to  his  Twitter sparring with candidate Trump during the election  and for a startling connection unearthed by Jack Cashill more than five years ago in World New Daily.

Modernizers launch a coup within the House of Saud