Given a document, find the main entity about whom the author is writing. Write the full name if mentioned in the text. Note that URLs in the text have been replaced with [Link].

Example input: At least Raheem Morris finally has the name of the Bucs' starting quarterback in the back of his mind.
 He wants to make sure he made the decision with his head and not just his heart.
 That's why Morris declined to name his choice between Byron Leftwich and Luke McCown on Friday until after one last consultation with his coaching staff.
 After that  Morris said  he would inform the owners  then his team before making the eagerly awaited announcement. Players were off Friday  so an announcement could come this morning.
 "We'll have a decision here in the near future " Morris said. "I think we've got to go with who we think gives us the best chance to win.
Example output: Raheem Morris
Example explanation: Here the main entity is Raheem  Morris since the main topic of the document is about him starting as quarterback.
Q: Russian President Vladimir Putin has a "bad" untold secret about Donald Trump that will eventually come out  Joe Scarborough said on Friday.
" Vladimir Putin  has something on Donald Trump " Scarborough charged Friday on  his  "Morning Joe" show on MSNBC.
"Let me say it again  because thereâs been a lot of noise from Donald Trump over the past year since heâs been president.  Vladimir Putin  has something that  he  is holding over Donald Trumpâs head. And it is bad."
"So what is Donald Trump hoping? He is not hoping he can just brush aside a story of a porn star. Heâs hoping when the truth comes out about what  Vladimir Putin  has and has had hanging over  his  head for decades  possibly  that we will all be too numb to notice " Scarborough said.
"Ten tweets a day  five lies a day  bread and circuses  all of these game show  reality show distractions ... Thatâs all  he âs hoping.  He  wants to numb the American people.  He  wants to numb the electorate.  He  wants to numb everybody."
Scarborough did not elaborate on what information  Putin  may have about Trump.
The commander in chief has been criticized for what one Democrat called his "bromance" with  Putin . And in November  Sen. John McCain slammed Trumpâs comments that he sincerely believed  Putin  meant it when  he  said  he  didnât meddle in the 2016 presidential election.
A:
Putin