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:
I dread many things about dining out in the coming year  from closings of beloved restaurants to ever-weirder ramen mutations. But the scariest of all may be the expansion of the online reservation app Tock  which makes you pay in advance for your meal at the time of booking — mostly at super-luxury eateries  but increasingly at lower-priced places  too.
The great Eleven Madison Park is the only place in Manhattan that currently uses three-year-old Tock for all seatings (though it’s also one of the very few restaurants worth such hassle). In Williamsburg  tiny Aska also uses the app exclusively. Now  Tock — which is used by just 300 US restaurants  compared to 43 000 for OpenTable and 1 000 for Resy — is trying to lure in lesser joints such as Té with Tock Intro.
Backed by millions of dollars in venture-capital funding  Tock promises great things to owners. Its platform can help them better manage reservations and reduce no-shows. Customers supposedly benefit from avoiding the hassles of reserving by phone.
But I hate having to buy a ticket for a meal — even for a world-class place such as Eleven Madison Park or Chicago’s Alinea  which is co-owned by Nick Kokonas  who also happens to be the founder of Tock.
Certain places that use OpenTable or Resy require a $50-a-head credit-card deposit. I’m not crazy about that  but at least we’re not giving them an interest-free loan of nearly $1 200  as a table for four would be at Eleven Madison Park reserved months from now on Tock.
Tock is striving to make inroads here by handling New Year’s Eve bookings at places that would otherwise use OpenTable or Resy. “New Year’s Eve has notoriously high demand and no-show rates  so we’re seeing a large number of restaurants using Tock Intro to combat the no-show issue ” says a company rep.
Among them: The Lambs Club and Lupa Osteria Romana — where you can only book the $275-per-head “Roman feast” starting at 9:45 p.m. on Dec. 31 using  Tock .
 Tock ’s strategy is to persuade users of the limited service to switch to the site full-time.  Tock ’s rep says  “Many restaurants start with  Tock  by offering a single prepaid experience  which is what you’re seeing with Lupa’s NYE dinner. After they see the full platform … they often transition all reservations over to  Tock .”

Ex Output:
Tock


Ex Input:
Certainly  Game 3 of the National League Division Series  won  2-1  by the Chicago Cubs over the Washington Nationals  was a kind of paradise for second-guessing. In fact  some might say the final score was: Decisions that blew up on Dusty Baker (2) over Decision that blew up on Joe Maddon (1).
Asked whether he’d heard Rizzo yelling  Baker said  “Nah  I don’t care. I’d have screamed  too.”
Soon  it was Baker’s turn. In the seventh inning with one out  Ben Zobrist broke up what had been a marvelous  downright gallant no-hit bid by Max Scherzer  who had spent the last nine days wondering whether the next time he pitched full-bore he might blow out his tight right hamstring and be done for the year. Before this game  Scherzer said he figured he would be good for maybe 100 pitches. He was at 98.
 Baker  called for Solis. The Cubs countered with the dangerous Albert Almora Jr.  who hit .342 against southpaws this year. Almora singled home the tying run on a change-up that stayed — up.
Finally  in the brutal eighth  in a decision and a moment that may be the most painful of the Nationals’ season if they do not rebound from this deficit   Baker  decided not to intentionally walk Rizzo  the Cubs’ top RBI man — by miles — and instead bring in lefty specialist Perez to cope with him. It was a journeyman-with-a-specialty against a superstar.
 Baker  had options.  He  could have walked Rizzo and let Brandon Kintzler  an all-star closer this year for the Minnesota Twins  pitch to Cubs cleanup man Willson Contreras  who is powerful but strikeout prone.  He  could even have (perhaps) overmanaged and brought in  his  best pure-stuff right-hander  Ryan Madson  to face Contreras to try to overpower  him .
Instead   Baker  believed in Perez. And  since this is baseball  Perez won the battle but lost the game. Perez jammed Rizzo  forcing that weak  sickly blooper into left field. That  anyway  is how it was described by  several Nats  including Baker . To the Cubs  it was a perfectly placed clutch hit.
For the record  as they say  with perfect hindsight  I think that  the Nats  may have managed as if the playoffs were different from the regular season — which is a current vogue. If this game had been played in August  I suspect there would have been little complexity.
And better options might have been chosen — ones that did not end up with  the Nats  losing a huge game in which neither of their two best relievers  Madson or Sean Doolittle  ever appeared.
Could that all have worked out so simply? Kintzler in the seventh  Madson in the eighth and Doolittle in the ninth to put the Nats one win from the National League Championship Series? For what it’s worth  not one Nat  and I asked several  had any problem with any Baker move. One veteran said  “We are a solid team — in every area. It’s not like we have a couple of good relievers and nobody else we trust. Our bullpen is good all the way through now. Nobody’s second-guessing those decisions.”

Ex Output:
Baker


Ex Input:
Sam Altman  the 32-year-old president of Y Combinator  the most prestigious startup accelerator in Silicon Valley   has laid out this utopian vision over the years  and most definitively in a job listing posted on YC's blog in June 2016.
Like many of his peers in Silicon Valley   Altman  believes technology is the way to a better future. But  his  real-world ambitions are grander than most.  He  wants to investigate ways to build new cities  give people money for nothing  rethink voter registration  keep politicians accountable  and get new  Altman-approved leaders elected â all while running YC  which famously birthed startups like Airbnb and Dropbox.
Much like one of  his  notable colleagues  Tesla CEO Elon Musk   Altman  is set on turning the ideal into the practical. Both believe they have solid ideas for reshaping society. Sometimes this means executing plans within the next few months. Other times it means roadmapping projects decades down the line  and relying on phrases like "The math should work out" to assuage a wary public.
"I have a very strong vision of where I'd like to see the world go "  Altman  said. "And I don't think it gets there by startups alone."
In 2005  at age 19   Altman  dropped out of Stanford to found the social-networking app Loopt  which  he  sold in 2012. In 2014   he  replaced Paul Graham as YC president. These days   he  says  he  spends 80% of  his  65-hour weeks helping startups sort through their growing pains and get to market as fast as possible. The remaining 20% is dedicated to outside projects.
 His  baby is OpenAI  a nonprofit he cochairs with Musk that searches for benevolent ways to use artificial intelligence in daily life.  Altman 's vision for how OpenAI could be deployed sheds light on how  he  wants to help people in real ways.
"Let's imagine we get to a world where AI gets so good that robots can mine raw materials out of the ground  refine them  and build them into a house "  he  told Business Insider. (These robots   he  clarified  are solar-powered.) "You can imagine a world where you own a small piece of land  you can say  'Hey  robot. I would like a house here ' and you come back like a month later and there's a fully constructed house built for you for free."
 Altman  sees that kind of far-future scenario as a boon for towns and cities plagued by a shortage of affordable housing.  He 's seen the plight firsthand  from  his  home state of California to middle America.
In November 2016  shortly after Donald Trump won the presidency   Altman  left YC's headquarters in Mountain View  California  in search of 100 supporters of the president-elect.  He  asked them about their political views  their fears  and their gripes with America's political landscape.  He  later published  his  findings on  his  blog for the world to see. "People don't believe they have an economic future "  he  said.
Over the past year   Altman  has expressed a deep interest in resolving those economic concerns.
"[Fifty] years from now  I think it will seem ridiculous that we used fear of not being able to eat as a way to motivate people "  he  wrote in a January 2016 blog post on YC. "I also think that it's impossible to truly have equality of opportunity without some version of guaranteed income."
 Altman 's own experiment is small  for now. It's running in Oakland  California  and involves about 100 people getting between $1 000 and $2 000 a month. The goal is to get some practice with delivering the money and collecting data. If that data come back showing basic income has left people better off  both emotionally and financially  YC will expand the project in a five-year  nationwide trial.
Society is poised to lose millions of jobs to AI  the prevailing research suggests. And it's propelled in part by Silicon Valley-types like  Altman   who himself is researching how robotics can replace human labor on a grand scale with projects like OpenAI. In recognition of that responsibility  he believes the tech world should at least be trying something.
But for all his involvement in political issues   Altman  doesn't consider himself a political person. He was raised in St. Louis to a pair of Democrat parents  with childhood memories of his time as a Boy Scout  tinkering with his Macintosh  and reading science fiction. He was interested more in computers than current events.
Elizabeth Rhodes picked up on that mind-set in her first face-to-face encounter with  Altman   earlier this February. Rhodes was wrapping up her doctorate in political science and social work at the University of Michigan and had applied to lead YC's nascent basic-income project. In May  YC announced she had been selected.
"He was definitely very passionate about people's struggles " Rhodes recalled of her first meeting with  Altman . Now more than a year into the job  she said  Altman 's interest in solving social problems through policy has come more into focus. " He 's able to see more systemic changes that we could make  and  he 's not afraid to say  'Let's try testing it out.'"

Ex Output:

Sam Altman