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].

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"I'm still kind of in shock " says Edward Geist  a researcher specializing in Russia at the Rand Corp. "My guess is they're not bluffing  that they've flight-tested this thing. But that's incredible."
The U.S. did go on to investigate the idea of a nuclear-powered missile   Geist  says. Known as the Supersonic Low Altitude Missile  the idea was more like a nuclear-powered drone aircraft. "It was actually supposed to fly around autonomously and drop nuclear gravity bombs "  Geist  says.
The nuclear reactor that would keep SLAM aloft would also spew radioactive exhaust   Geist  says. At the time  that was advertised as a feature  not a bug  because it would have had the added benefit of polluting the Soviet countryside.
"It was supposed to be really  really dirty "  Geist  says.
The U.S. got as far as actually building the nuclear engine for Project Pluto  a development project at the Nevada Test Site. The reactor was tested a number of times in the early 1960s  and it performed well. But by that point  awareness had grown about the dangers of nuclear fallout  and arms control treaties were coming into place   Geist  says. Those concerns were among the reasons the project died in 1964.
The type of reactor used in Project Pluto was particularly messy because it exposed the nuclear fuel directly to the outside air.  Geist  says the new Russian missile may use a different system that keeps the fuel somewhat isolated from the air. But   he  quickly adds  that wouldn't make it safe.
"There are a bunch of different ways to do it  and frankly  they're all terrible "  Geist  says.
 He  suspects that the Russian design would involve what's known as a "fast reactor " which is more efficient  but also less safe  than most nuclear reactors. If the missile crashed or the reactor failed  it would trigger a major incident.
"It's just crazy they field-tested this thing "  he  says.
 Geist  says  he  expects Russia's provocations to continue. "They're sending us a message that they are not OK with our U.S. missile defense posture "  he  says.
That message? "They're willing to go full Strangelove on us "  Geist  says.

Ex Output:
Edward Geist


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Jaden Smith  is sliding his way into 2018 with a bang . The 19 year old was performing at the 2017 Rolling Loud festival in San Bernadino over the weekend   where he shocked the crowd with a killer moonwalk . He was playing his single " Icon " from his album SYRE and rapping the words " Gold grills and you dance like Michael " before sliding his feet smoothly across the stage . What kind of wizardry is this  Jaden Smith  ? SEE ALSO : Dude jamming to Michael Jackson has some seriously infectious dance moves  Smith  sat down with Revolt and told them about  his  loving for the moonwalk and who actually taught  him  -  his  mom . " I like to think my mom taught me how to moonwalk ' cause she ' s amazing at dancing  "  he  told them . " I would always watch  Michael  when I was young and  he  ' d be moonwalking and I don ' t know   I just kind of picked it up ."  His  performance didn ' t go unnoticed by the internet . Although Smith can ' t replace the icon Michael Jackson   fans still praise the artist for trying his hand on the famous dance . Many believed he was making the King of Pop proud . 😮 that felt like I was seeing @ michaeljackson possess @ officialjaden for a second . 🙇🏻 — Rey Rey Rodriguez (@ themindofreyrey ) December 18   2017 Nothing but respect for MY president — Chad (@ CNibbz ) December 17   2017 jaden smith has shaped multiple moons with his bare hands of course he can moon walk — kelby (@ whoisklby ) December 18   2017 Doesn ' t even look real . You ' d almost think it was CGI ! I think MJ would be proud . pic . twitter . com / KTs7RprFGR — Oh SoFrieda (@ OhSoFrieda ) December 18   2017 someone : hey how are y - me : jaden smith is the future — h (@ halsey ) December 17   2017

Ex Output:
Smith Jaden


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Britain is poised for another Royal Wedding  after it was announced on Monday that  Prince Harry  is to marry the American actress Meghan Markle.
Prince Charles  Harryâs father  and his wife Camilla  who is  Harry âs step mother  said they were âthrilledâ and âvery happy indeedâ for the couple.
 Harry âs older brother William and  his  wife the Duchess of Cambridge  who celebrated their marriage in 2011  said: âWe are very excited for  Harry  and Meghan. It has been wonderful getting to know Meghan and to see how happy she and  Harry  are together.â
The former British Prime Minister David Cameron also took to Twitter to congratulate the pair. He said: âCongratulations to  Prince Harry and Meghan Markle . Wonderful news and I wish  them  a long and happy life together.â

Ex Output:

Prince Harry