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]: Dustin Johnson  left  and Wayne Gretzky  right  walk to the second tee of the Spyglass Hill Golf Course during the first round of the AT&T Pebble Beach National Pro-Am. (Photo: Eric Risberg  AP)
In front of a large mobile gallery on a spectacular day on the Monterey Peninsula during the first round of the AT&T Pebble Beach Pro-Am   Dustin Johnson  and Wayne Gretzky joked  their  way through 18 holes and played superbly as a team on the historically toughest golf course of the three layouts used in this event. Gretzky  who plays fast and clutches a cigar as much as he takes hold of a golf club  got things going by making a birdie for the first time in his golf career on the par-5 first at Spyglass and  getting a stroke because of his handicap   the team  was 2-under-par after one hole.
While Gretzky added another birdie on the par-5 seventh and a clutch par on 16 for birdie   Johnson  was overpowering the seaside and tree-lined course with six birdies en route to a 5-under-par 67. As a team  they shot 65.
 Johnson   who kicked off the year with a win in the Sentry Tournament of Champions in Hawaii  is on the first page of the leaderboard and in position to win for the third time here.
 Johnson  and Gretzky have had a visible bond since  Johnson  started dating Gretzkyâs daughter  Paulina  in 2012. Back then   Johnson  was ranked in the 20s â a freak of talent and power who  while winning a tournament a year  fell short of joining the elite class as  he  struggled with  his  short game and course management and didnât buy in 100% to preparation.
A shift to Butch Harmon as his swing coach paid dividends as  Johnson  has become one of the most feared in the game from 150 yards and in.  Johnson  became a gym rat and severely cut down the times  he  painted the town red at night.  Johnson  also became a father  as  he  and Paulina (they are engaged) are the parents of two young boys â Tatum and River Jones.
And  Johnson  has credited Gretzkyâs guidance and advice for  his  ascension up the world rankings.  Johnson  often picked the NHL iconâs brain and said Gretzkyâs support and belief did wonders for  his  confidence. The two quickly became regular golf partners and talked for hours about how to handle sports fame  pressure and expectations  with Gretzky  in  his  mentoring ways  always stressing to never settle.
As  Johnson  changed  his  habits   his  world ranking changed.  He  was 23rd in the world at the end of 2012  16th at the end of 2013  19th at the end of 2014  eighth at the end of 2015 and third at the end of 2016  when  he  won three of  his  17 PGA Tour titles  including  his  first major championship at the U.S. Open.  He  became No. 1 when  he  won at Riviera Country Club in February of last year and has stayed there for 51 weeks as  he âs piled up four more wins.
 He  has no intentions of leaving.
âThere are a lot of really good players that are playing really well right now  so it's going to be tough for me to keep it â  Johnson  said. âBut if I keep playing like I am and how I should  I'll be there at the end of the year.â
[EX A]: Dustin Johnson

[EX Q]: Lebanon's Prime Minister Saad Hariri  arrived back in Lebanon two weeks after  he  announced  his  surprise resignation while in Saudi Arabia. Within hours of landing at Beirut International Airport  Hariri shocked the country by announcing he had put his resignation "on hold" while talks with Hezb'allah and other political factions are underway.
Al Jazeera's Zein Khodr  reporting from Beirut  said that Hariri's tone has shifted since he gave his resignation speech two weeks ago. "He [Hariri] didn't even mention Hezbollah or Iran[.] ... He even said that he's looking forward to a partnership with all political parties in the country "What is clear is that there has been intensive discussions behind closed doors " she said. "The resignation was an attempt by Saudi Arabia to curb Hezbollah's influence[.] ... That attempt backfired[.] ...  Hariri  was conciliatory in  his  message."
What is going on? Whatever influence Saudi Arabia was exercising over  Hariri  has weakened since  he  left the kingdom. Before returning to Lebanon   Hariri  had meetings with several leaders  including Macron of France and el-Sisi of Egypt. France has a keen interest in what happens in Lebanon  since the tiny nation is a former French colony. And as a Sunni regional power  Egypt is on the front lines of resisting the spread of Iran's influence.
Those "intense discussions" almost certainly included Hezb'allah. Given that  Hariri  cited threats against  his  life by pro-Iranian and pro-Syrian factions in Lebanon as a primary reason for  his  resignation  it is possible that some sort of backroom deal with the terrorists was struck that gives certain assurances to  Hariri  regarding  his  personal safety. For Hezb'allah  part of that deal could have included  Hariri  promising to back away from Saudi Arabia.
[EX A]: Saad Hariri

[EX Q]: Bernie Sanders appears to be eyeing opportunities to further develop his support base in California ahead of a potential 2020 presidential run . 
Indeed , receiving policy support from California is nothing new for Sanders , who saw some of his 2016 campaign 's biggest donors coming from the West Coast state , with $ 17.1 million of donations coming from California - $ 4.2 million of that just from Los Angeles and Long Beach and $ 2.7 million coming from San Francisco , a report from McClatchy 's Washington Bureau states . 
Speaking at the California Nurses Association , Sanders , who has not yet confirmed whether he intends to run in 2020 , said in comments carried by Mercury News : "Medicare for senior citizens has worked , and we want Medicare to work for every man , woman and child in this country . 
In addition , California is a good fit for Sanders because he is believed to be one of few candidates who has the experience , backing and resources to win delegates in such a large , and costly , state in which to garner support .
[EX A]:
Bernie Sanders