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].

Input: Consider Input: NBC will broadcast the Ceremonies again in prime time tonight  at 8 p.m. Eastern. This version will have commentary from hosts Katie Couric  who was tapped to place Matt Lauer after his firing  and Mike Tirico  who replaced  Bob Costas  as NBC’s prime-time host after a nearly three-decade run.
Tirico made his prime-time debut Thursday night. The Washington Post’s Rick Maese caught up with him before the Games to learn more about his new high-profile assignment. “I think trying to be  Bob  would be stupid. And that was one of  his  bits of advice: Be yourself ” Tirico said. “So I’m going to try to do that.” For the full Q&A  scroll down to the “Olympics Corner” section of this newsletter.
For 11 straight Summer and Winter Games — dating back to 1992 —  Bob Costas  served as the familiar and reliable face of the Olympics. But  Costas  is sitting out the PyeongChang Games and has passed the torch to Tirico  who will serve as NBC’s prime-time host  starting with Friday’s Opening Ceremonies. Tirico joined the network in 2016 after more than two decades at ESPN and was a daytime host of the Rio Games. He recently spoke with The Washington Post’s Rick Maese about his new high-profile assignment.
Q: It’s not like you’re a newcomer to this broadcasting game  but did you seek out  Costas  for any advice?
A: There’s been a longtime friendship there. I don’t think that’s overstating it. And I can’t imagine this job changing hands more smoothly.  Bob  has been unbelievable in making  himself  available  if I have any questions. I know I can pick up the phone during the Games  and if I have a question  I know I’ll get an honest answer.  Bob ’s the all-time best.  Bob  set a standard for the amount of times  he  did this and the way  he  did it that likely won’t be matched ever again. So I’m not replacing  him ; I’m following  him . I think trying to be  Bob  would be stupid. And that was one of  his  bits of advice: Be yourself. So I’m going to try to do that.
 Bob Costas  served as NBC’s prime time host for 11 straight Olympics  but has passed the torch to Mike Tirico for the PyeongChang Games. (Courtesy photo/NBC Sports)
A: The best piece of advice that I got from  Bob  and from Al [Michaels] before the Rio Games working daytime: You don’t have to know everything about everyone. It’s impossible. The experts at each sport have that covered. In the host role  you just need to have the overriding story lines. I’m trying to get to the top of the surface. It’s like one of those fancy Starbucks drinks — you do want to get some of the coffee  but you want to make sure you get all foam. But how has my life changed? I’m sitting in my office right now. Two years ago  I certainly would be watching a replay of a Big Ten or an NBA game from the night before. And right now I’m watching the women’s skeleton competition from Germany. And it’s the fourth different Olympic event that I’ve watched since I’ve been up this morning.

Output: Bob Costas


Input: Consider Input: LOS ANGELES (Reuters)  - Oscar-winning Casey Affleck  who has been accused of sexual harassment by female crew members on an earlier film   has withdrawn as a presenter at the 2018 Academy Awards  a spokeswoman for the organization said on Thursday.
 Affleck  the younger brother of actor and director Ben Affleck   topped challenges from Denzel Washington and Ryan Gosling to win the 2017 award.  He  also took home a Golden Globe and numerous trophies from film critics groups.
FILE PHOTO:  Casey Affleck  arrives for the 89th Academy Awards  Oscars Red Carpet in Hollywood  California  U.S. February 26  2018. REUTERS/Mario Anzuoni/File Photo
An attorney for  Affleck  denied the accusations at the time.
 Affleck  adopts a lower public profile than  his  brother Ben and appears uncomfortable in the spotlight.  He  was first nominated for an Oscar in 2008 for  his  lead role in âThe Assassination of Jesse James by the Coward Robert Ford.â
89th Academy Awards - Oscars Red Carpet Arrivals - Hollywood  California   U.S. - 26/02/17 - Casey Affleck  arrives REUTERS/Mario Anzuoni
While  Ben Affleck  has opted for big movies like âBatman v Superman: Dawn of Justice â  Casey Affleck  has focused  his  career on smaller  independent ventures with strong character-driven plots such as âGone Baby Gone.â
In 2010   he  wrote and directed Joaquin Phoenix in âIâm Still Here â a mockumentary about Phoenixâs supposed transition from acting to becoming a rap musician.
Two years ago  he  quietly separated from  his  wife  actress Summer Phoenix  after a nine-year marriage that produced two sons.

Output: Casey Affleck


Input: Consider Input: Bernie Sanders to visit SF on Friday for state nurses convention . 
Photo : Tom BrennerThe New York Times   Image 1 of  6 Caption Close Image 1 of 6 Sen. Bernie Sanders -LRB- I-Vt . -RRB- 
less Sen. Bernie Sanders -LRB- I-Vt . -RRB- 
The former presidential candidate will be in San Francisco on Friday to address a ... more Photo : Tom BrennerThe New York Times   Image 2 of 6 Sen. Bernie Sanders -LRB- I-Vt . -RRB- 
On the same day that Republican lawmakers were pitching a last-gasp effort to undo the Affordable Care Act , Sanders said that 15 Democratic senators have signed on to what he called a a Medicare-for-all , single-payer health care system . 
-LRB- Tom BrennerThe New York Times -RRB- less Sen. Bernie Sanders -LRB- I-Vt . -RRB- 
, holds a news conference regarding health care policy , on Capitol Hill in ... more Photo : TOM BRENNER , NYT Image 3 of 6 Senator Kamala Harris , a Democrat from California , speaks as Senator Bernie Sanders , an independent from Vermont , left , listens during a health care bill news conference on Capitol Hill in Washington , D.C. , U.S. , on Wednesday , Sept. 13 , 2017 . 
Photographer : Andrew HarrerBloomberg less Senator Kamala Harris , a Democrat from California , speaks as Senator Bernie Sanders , an independent from Vermont , left , listens during a health care bill news conference on Capitol Hill in Washington , D.C. , ... more Photo : Andrew Harrer , Bloomberg Image 4 of 6 Sens. Elizabeth Warren -LRB- D-Mass . -RRB- 
look on as Sen. Bernie Sanders -LRB- I-Vt . -RRB- 
Sanders said that 15 Democratic senators have signed on to what he called a "a Medicare-for-all , single-payer health care system ." 
look on as Sen. Bernie Sanders -LRB- I-Vt . -RRB- 
spoke at a news conference on health care policy , on Capitol Hill in Washington , ... more Photo : TOM BRENNER , NYT Image 5 of 6 Sen. Bernie Sanders , I-Vt. , second from right , declines to speak with a reporter as he walks to a luncheon with Democrats on Capitol Hill in Washington , Tuesday , Sept. 12 , 2017 . 
-LRB- AP PhotoSusan Walsh -RRB- Sen. Bernie Sanders , I-Vt. , second from right , declines to speak with a reporter as he walks to a luncheon with Democrats on Capitol Hill in Washington , Tuesday , Sept. 12 , 2017 . 
-LRB- AP PhotoSusan Walsh -RRB- Photo : Susan Walsh , Associated Press Image 6 of 6 A doctor and other supporters gather before Sen. Bernie Sanders , I-Vt. , and other democratic Senators arrive for a news conference on Capitol Hill in Washington , Wednesday , Sept. 13 , 2017 , to unveil their Medicare for All legislation to reform health care . 
-LRB- AP PhotoAndrew Harnik -RRB- less A doctor and other supporters gather before Sen. Bernie Sanders , I-Vt. , and other democratic Senators arrive for a news conference on Capitol Hill in Washington , Wednesday , Sept. 13 , 2017 , to unveil their ... more Photo : Andrew Harnik , Associated Press Bernie Sanders to visit SF on Friday for state nurses convention 1  6 Back to Gallery . 
Sen. Bernie Sanders will visit San Francisco on Friday to promote his recently introduced Medicare for All plan at a convention of California nurses . 
Sanders introduced his Medicare for All bill on Sept. 13 . 
The California Nurses Association , though , welcomes Sanders ' legislation as part of a "common fight for health care for all and social justice ," RoseAnn DeMoro , the union 's executive director , said in a press release announcing Sanders ' visit . 
The event begins on Thursday and will feature speakers , including Sanders ' wife , Jane O'Meara Sanders , founder of the Sanders Institute . 
Also set to speak are playwright Eve Ensler , political commentator Van Jones and Nina Turner , president of Our Revolution , an organization founded by leaders of Sanders ' campaign . 
Sanders is scheduled to take the stage at 1 p.m. Friday .


Output: Bernie Sanders