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].

Ex Input:
Gen. Mohammad Ali Jafari  head of Iranâs Islamic Revolutionary Guard Corps   added that Iran had the capability to expand its missile range beyond that limit  the Washington Free Beacon reported  citing information from U.S. officials and regional reports.
The comments by  Jafari  appeared to be an effort by Iranian authorities to contrast their missile program  which they often describe as being for defensive purposes  against those of countries like North Korea  which has talked about launching missiles that can hit any U.S. city.
Speaking on the sidelines of a conference in Tehran   Jafari  told journalists that the capability of Iran's ballistic missiles was "enough for now. "
Jafari  said  he  didnât believe that the U.S. and Iran would go to war anytime soon  though some may question  his  reasoning.
Referring to the United States   he  said: "They know that if they begin a war between Iran and the United States  they will definitely be the main losers and their victory will by no means be guaranteed. Therefore  they won't start a war."

Ex Output:
Mohammad Ali Jafari


Ex Input:
"An American first: a president who was obviously mentally ill the moment  he  took office  " Krugman  tweeted along with a New York Times report that Trump brought up debunked claims that millions of people voted illegally in the election  causing  him  to lose the popular vote  during a Monday night meeting with Congressional leaders.
 Krugman  has criticized Trump repeatedly since  his  election â questioning Trump's business conflicts of interest   his  Cabinet nominees  the involvement of Russia in  his  election  and more. But this is the first time  Krugman  called into question the mental fitness of the president.
 Krugman  has also been critical of Comey  arguing that Comey's letter to Congress regarding the renewed investigation into Hillary Clinton's use of a private email server swung the election in Trump's favor.
 Krugman  highlighted part of a Washington Post article about Trump's attitude after the election. "Read it and shudder " he wrote.
In subsequent tweets   Krugman  said that despite Trump's best efforts  the growing difference between increasing US interest rates due to rate hikes from the Federal Reserve and the interest rates throughout the rest of the world would increase the strength of the US dollar. A strong dollar would be harmful to US manufacturing  offsetting any pro-manufacturing policies from Trump   Krugman  said.

Ex Output:
Paul Krugman Paul


Ex Input:
Police busted  Michael Cognato   35  on Thursday for violating an order of protection barring him from any contact with the student.
 Cognato  is accused in the original October case with sending the girl naked pictures and at least 15 videos of  himself  masturbating between August and October.
 He  had taught the teen while she was in eighth grade at Intermediate School 93 in Ridgewood and the two remained in contact when she went on to high school.  Cognato  tutored the teen and often contacted her via Facebook messaging and Skype  officials said.
 He  soon began sending explicit photos of  himself  and convinced the teen to send  him  back naked pictures of herself  cops said.
In October police charged  Cognato   of Bethpage  L.I.  with using a child in a sexual performance  promoting a sexual performance by a child and acting in a manner injurious to a child after the teenâs mother contacted cops.
Education Department officials said  Cognato  began working as a teacher at IS 93 in 2001.  He  has no previous disciplinary history.
After  his  arrest   he  was taken out of IS 93 and transferred to a central Education Department office for administrative duties. Meanwhile  Education Department officials began the process of taking  him  off the payroll.

Ex Output:

Michael Cognato