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 Q]: Facebookâs  first major investor Peter Thiel  has sold three-quarters of  his  remaining stake in the social network as part of a previously established trading plan  a regulatory filing showed.
 Thiel   who is a member of Facebookâs board  had already sold more than $1 billion worth of  its  stock before the filing made on Tuesday.
 It  said  he  had sold another 160 805 shares for about $29 million  leaving  his  holdings at 59 913 Class A shares in the company.
 Thiel  co-founded payment service PayPal and is known for funding the Hulk Hogan lawsuit that led to the shutdown of online news site Gawker. He became a Facebook investor in 2004 with an initial investment of $500 000 at a $5 million valuation.
When Zuckerberg took the company public in 2012   Thiel  sold 16.8 million shares at the IPO for about $640 million. Later the same year  he sold roughly 20 million of his remaining 26 million shares for $400 million after the expiry of a lockup.
[EX A]: Peter Thiel

[EX Q]: The 32-year-old Wisconsin man was not a threat to Sundayâs Chicago Marathon  and it was believed he was in town to drop off a friend at OâHare International Airport  said  chief Chicago police spokesman Anthony Guglielmi .
Around 8 a.m.  Chicago police assigned to O'Hare stopped a vehicle for speeding near the Kennedy Expressway on Cumberland Avenue   Guglielmi  said.
Once police pulled them over  an officer saw a handgun in the 2005 Mitsubishi Galant. Police were then told that an AR-15 rifle was in the trunk   Guglielmi  said.
In addition to 217 rounds of ammunition  police found a pressure cooker device in the trunk of the car. But it was inspected by Chicago police and the FBI  who determined that the device was not being used as a weapon  but rather for cooking   Guglielmi  said.
Three people were inside the vehicle  and all were taken into custody   Guglielmi  said.
"Runners and spectators in Sunday's marathon "can expect to see a very visible presence of Chicago police officers ''  Guglielmi  said in an emailed statement.
[EX A]: Anthony Guglielmi

[EX Q]: -- Donald Trump on Hillary Clinton , 2008 . 
If elected , Hillary Clinton could turn out to be a feckless , one-term chief executive undone by events , lapses in judgment and the sclerotic ways of Washington . 
If elected , Clinton will make a good president . 
Whether Clinton has learned from these brushes with scandal is hard to say . 
They know , in short , what Trump knew back then : Hillary Clinton will be a good president .
[EX A]:
Hillary Clinton