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:
A self-portrait of 43rd President George W. Bush . 
-LRB- Provided by George W. Bush Presidential Center -RRB- . 
As part of the 9th annual Freedom Conference & Festival , a conservative confab taking place in Steamboat Springs next month , the paintings of 43rd President George W. Bush will be on display for attendees at the Steamboat Grand Hotel . 
"This is the first time the -LRB- Bush -RRB- exhibit has been shown in Colorado , giving state residents a unique opportunity to view this popular collection ," wrote Jackson Shedelbower , of the Steamboat Institute , in an email . 
The one-day exhibition on Friday , Aug. 25 , organized by the Steamboat Institute , marks the Colorado debut of Bush 's work from "The Art of Leadership : A President 's Personal Diplomacy" exhibition , which features paintings of world leaders Bush met during his tenure in the White House including Vladimir Putin , Angela Merkel , Hamid Karzai , Ellen Johnson Sirleaf and Tony Blair . 
Although some balked at the idea of Bush as a fine artist when he took up painting in his post-presidential retirement , the 71-year-old has stuck to his guns and humbly worked to improve his art . 
"Portraits of Courage : A Commander in Chief 's Tribute to America 's Warriors ," a book of Bush 's paintings of wounded U.S. military veterans that was published in February , netted surprisingly favorable reviews from critics and topped The Washington Post 's best-selling books list earlier this year . 
"-LRB- Bush -RRB- was really putting himself out there and taking a personal risk with these paintings , not knowing what people would think of them ," said Jennifer Schubert-Akin , CEO of the free-market , nonprofit Steamboat Institute . 
Bush will personalize a copy of the book that is being auctioned on the Steamboat Institute 's fundraiser as part of its $ 75-per-person Red , White & Blue Bash fundraiser on July 20 , Schubert-Akin said , with bidding starting at $ 300 . 
A portrait of 41st President George Bush by his son , 43rd President George W. Bush . 
-LRB- Provided by the George W. Bush Presidential Center -RRB- .

Ex Output:
George W Bush


Ex Input:
Two recent books look at the very human (sometimes all-too-human) process of trying to make sense of the known universe:  The Un-Discovered Islands: An Archipelago of Myths and Mysteries  Phantoms and Fakes  by Malachy Tallack  and The Planet Factory: Exoplanets and the Search for a Second Earth  by Elizabeth Tasker .  They 're so stylistically and scientifically disparate as to seem unrelated  but reading  them  in close succession makes for something greater than the sum of its parts â a joint atlas of human guesses in a world that seems destined to confound us.
 Elizabeth Tasker  knows all about that; The Planet Factory is all about the formation of worlds humanity might never clap eyes on. And if you're hoping for definitive answers about how things work closer to home  think again;  Tasker 's very clear that the scientific method is as often about being proven wrong. "The problem (and there is always a problem)" isn't just an aside on a particular theory  but a thesis for the field. This is a book about trying to map unknown seas in real time; the ghosts of the sailors peering into the dawn looking for Thule live in every telescopic survey.
The Planet Factory can feel intimidating; certainly you must come to it wanting to know everything there is to know about making planets  and hang in there as long as you can before the variables overwhelm you. ( Tasker  offers easy analogies by the handful  and while at first they may seem too easy  you'll appreciate them by the time you're trying to understand the optimum timing of planetary migration.)
The Planet Factory Exoplanets and the Search for a Second Earth by Elizabeth Tasker Hardcover  336 pages   purchase close overlay Buy Featured Book Your purchase helps support NPR programming. How?

Ex Output:
Elizabeth Tasker


Ex Input:
Houston Texans linebacker Brian Cushing (56) against the Kansas City Chiefs at Arrowhead Stadium. (Photo: Kirby Lee  USA TODAY Sports)
 Linebacker Brian Cushing  has been informed by the team that  he  will be released by the start of the league year on March 14  according to the Houston Chronicle.
Asked about  his  impending departure   Cushing  told the Chronicle  âItâs all good. Itâs just part of the business."
The Texans will save more than $7 million by releasing  him .
Cushing  31  has been a starter for the Texans since  he  was a first-round pick out of Southern California in 2009.  He  was named the Associated Press' defensive rookie of the year that season.
In 2017   he  served a 10-game suspension for violating the NFL's policy on performance-enhancing substances and played in just five games. Knee injuries also sidelined  him  for all but 12 contests in 2012 and '13.

Ex Output:

Brian Cushing