instruction:
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].
question:
Goldman Sachs CEO Lloyd Blankfein  has bitcoin on  his  mind  a day after reports broke that  his  firm was considering setting up a bitcoin trading operation.
The billionaire banker tweeted on Tuesday that  he  wasn't completely sure about  his  stance on the red-hot cryptocurrency.
 Blankfein  said  he 's "still thinking about bitcoin" and that  he  was not flat out endorsing or denouncing the digital currency. Here's the full tweet:
Still thinking about #Bitcoin. No conclusion - not endorsing/rejecting. Know that folks also were skeptical when paper money displaced gold. â Lloyd Blankfein (@lloydblankfein) October 3  2017
answer:
Lloyd Blankfein


question:
Keith Perkins  got the phone alert and later heard the sirens going off in  his  southeast Alaska hometown of Sitka.
 He  said people on Facebook were chattering back and forth about whether this was real or not and what they should do.
Given the magnitude of the earthquake   Perkins  said  he  thought it best to head to the high school  a tsunami evacuation point  even though in the past  he  felt  his  home was at a "high-enough spot."
"I figured I'd probably just better play it safe "  he  said.
In Seward  at the southern end of Alaska's Kenai Peninsula  residents retreated to higher ground or left on the only road out of the city  fire chief Athey said. He described  it  as a controlled evacuation and compared  it  to folks driving home from a holiday fireworks show.
answer:
Keith Perkins


question:
The newly released trailer for Salman Khanâs upcoming Tiger Zinda Hai (English: "Tiger is Back")  is stirring up a frenzy among fans of the Bollywood superstar  who are eager for their idolâs return to the role that launched one of the highest-grossing action franchises in Indian movie history.
 The trailer  features a buff and menacing  Khan  riding horses  snowboards  motorcyles and ATV's  firing automatic machine guns and raining down a Hollywood-worthy storm of mayhem on an ISIS-style terrorist group that has had the nerve to kidnap 25 Indian nurses for ransom.
Itâs a stark contrast from the simple  sensitive character  Khan  played in  his  last picture  Tubelight  which failed to catch on with all but the Bollywood superstar's most loyal fans. The picture was widely deemed a bust and a money-loser for the distributors who bought rights  and for the investors who backed it. With its promise of big-budget thrills and adventure  Tiger Zinda Hai should get Khanâs jolted career back on track.
 The trailer  also prominently shows off Katrina Kaif as the martial arts expert and alluring Pakistani spy who teams up with  Khan 's Tiger to rescue the nurses and send terrorist leader Abu Usman to meet his maker.
The new picture is directed by Ali Abbas Zafar (Sultan)  produced by Aditya Chopra of Yash Raj Films  and features Bollywood megastars  Salman Khan  and Katrina Kaif in the lead roles.
answer:

Salman Khan