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].

Q: President Abdel Fattah al-Sisi  has once again threatened to crush the militants.
âThe armed forces and the police will avenge our martyrs and restore security and stability with the utmost force in the coming period â  he  said after Fridayâs carnage.
 Sisi  has called for a comprehensive campaign to counter what  he  describes as the existential threat of radical jihadism  deploying moderate clerics to promote moderate Islam  for instance.
 He  is expected to run for a second term early next year. Even with a convincing win   he  will face pressure to deliver on promises of stability  especially if attacks like that on  Al Rawdah  persist.
In a December 2016 issue of al-Nabaa  one of the groupâs religious leaders left little doubt that Sufis would be targeted. It mentioned  Al Rawdah  directly.

A: Abdel Fattah al-Sisi
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Q: 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- .

A: George W Bush
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Q: "We are taught that humans can taste only five taste categories " said Juyun  Lim    associate professor at Oregon State University's Department of Food Science and Technology and lead author of the study. "It seems  however  that we can taste other chemicals that comprise foods such as starch degradation products and fatty acids."
 Lim  added that some compounds  such as starch  are abundant in nature and that we use them as a source of energy.
"Understanding how we can detect and recognize our food sources is very important since it will directly impact our ingestive behavior and health "  she  said.
It was previously assumed that starch was tasteless  but the new findings suggest that starch is broken down into glucose oligomers by an enzyme in our saliva  called alpha-amylase  and these so-called glucose oligomers can be tasted   Lim  said.
"It has long been assumed that simple sugars are the only class of carbohydrates that humans can taste. Thus our findings are surprising "  Lim  said.
For instance  "as much as we know that glucose oligomer detection is not through the sweet taste receptor  we do not yet know the exact mechanism of how we detect them " Lim said.

A:
Lim
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