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:
Sam Querrey gave the United States a winning start in its bid to reach Saturday's final at the World Team Cup.
 Querrey beat Jan Hajek 6-3  7-5 on Thursday to put the U.S. 1-0 up against the Czech Republic in the Red Group and remain unbeaten in his three singles this week.
 "So far so good " said Querrey. "I thought today was the best I played out of the three matches. So I'm pretty excited."
 Hajek claimed the first break  when Querrey ended a long rally with a forehand error  to go 3-1 up but the American player responded by winning the next five games in a row to take the opening set.
 Both players saved a break point late in the second set before Querrey broke at 6-5  converting his third match point.
 "I've been working this week to try and hit my forehand a little bigger. I felt I did that today " said Querrey. "I felt pretty much anytime I got a forehand  I was able to take control of the point."
 Querrey said his win takes the pressure off the U.S. ahead of Friday's matches.
 "A little bit  yes. I think John (Isner) can go out there and play a little more freely  which is a good thing " Querrey said. "When we have the lead  you can swing away a little bit more than if we were 1-0 down.
 "Then  the Bryan brothers  we expect them to win every match. Hopefully  they are going to do that again."

Ex Output:
Sam Querrey


Ex Input:
Despite their hard-line  open borders demands  Senate Democrats  Flake  and Graham knew the terms of an immigration deal with the White House  as the  Trump  administration has said for months that no deal would be made unless legal immigration levels were reduced to raise the wages of American workers and full funding for the border wall along the U.S.-Mexico border was handed over.
Senate Democrats  Flake  and Graham have been unwilling to stray from their âGang of Sixâ amnesty plan and thus have attempted to blame  Trump  and senior adviser Stephen Miller for the shutdown  despite the terms of an immigration agreement remaining unchanged for months.
The Democrats are turning down services and security for citizens in favor of services and security for non-citizens. Not good! â Donald J. Trump (@realDonaldTrump) January 22  2018
Democrats have shut down our government in the interests of their far left base. They donât want to do it but are powerless! â Donald J. Trump (@realDonaldTrump) January 22  2018

Ex Output:
Donald J. Trump


Ex Input:
Gary Kaplan  50  must also forfeit $43.6 million in illegally obtained revenue as part of a plea agreement. Prosecutors have said that amounts to more than half of Kaplan's total worth.
 Kaplan pleaded guilty in August to racketeering conspiracy  violating the Wire Wager Act and conspiring to violate it. Prosecutors had been investigating offshore sports gambling since 1997  and BetOnSports since 2001.
 Kaplan  sentenced to four years and three months  could end up spending another year behind bars. He has been jailed for two years and seven months since his March 2007 arrest in Puerto Rico. U.S. District Judge Carol Jackson said it will be up to the Bureau of Prisons to determine if he is given credit for time served. Attorneys in the case noted that federal rules call for him serving 85 percent of the 51-month sentence  minus whatever credit he may be given for time served.
 In his guilty plea in August  Kaplan said BetOnSports had 1 million registered customers and accepted more than 10 million sports bets worth more than $1 billion in 2004 alone. HisHis company  by then based in Costa Rica  employed 1 700 people.
 Kaplan took BetOnSports public on the London Stock Exchange's Alternative Investment Market in 2004  which netted him more than $100 million that was deposited in Swiss bank accounts. For the next two years  he served as a BetOnSports consultant.
 Prosecutors said the company falsely advertised that its gambling operations were legal  and misled gamblers into believing that money transferred to BetOnSports was safe and available to withdraw at any time. Instead  investigators said  the money was used to expand operations  including purchase of a rival betting firm.
 Kaplan told Jackson in August that he initially believed that adhering to the laws in Aruba  Antigua  Costa Rica  the Dominican Republic and the United Kingdom kept him in good stead with U.S. laws. But he said he became aware as early as 2000 that such dealings violated U.S. law  and got confirmation in a legal opinion in 2002. Yet  he kept operating.
 Kaplan apologized to the judge Monday for the "pain and embarrassment" he caused to his family  and said he'd "paid a monumental price for poor decisions." His attorneys said that Kaplan  from his jail cell  has made six-figure contributions to St. Louis-area charities in recent months.
 Jackson said while recognizing Kaplan's generosity  she was "a little put off" by letters she's received from those charities on his behalf.
 "When I make a charitable contribution  I don't expect credit " she said. "I hope you will continue to support worthy charitable organizations even when it doesn't further any personal interest you may have."

Ex Output:

Gary Kaplan