TASK DEFINITION: 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].
PROBLEM: "An American first: a president who was obviously mentally ill the moment  he  took office  " Krugman  tweeted along with a New York Times report that Trump brought up debunked claims that millions of people voted illegally in the election  causing  him  to lose the popular vote  during a Monday night meeting with Congressional leaders.
 Krugman  has criticized Trump repeatedly since  his  election â questioning Trump's business conflicts of interest   his  Cabinet nominees  the involvement of Russia in  his  election  and more. But this is the first time  Krugman  called into question the mental fitness of the president.
 Krugman  has also been critical of Comey  arguing that Comey's letter to Congress regarding the renewed investigation into Hillary Clinton's use of a private email server swung the election in Trump's favor.
 Krugman  highlighted part of a Washington Post article about Trump's attitude after the election. "Read it and shudder " he wrote.
In subsequent tweets   Krugman  said that despite Trump's best efforts  the growing difference between increasing US interest rates due to rate hikes from the Federal Reserve and the interest rates throughout the rest of the world would increase the strength of the US dollar. A strong dollar would be harmful to US manufacturing  offsetting any pro-manufacturing policies from Trump   Krugman  said.

SOLUTION: Paul Krugman Paul

PROBLEM: “Jimmy is a player we have researched extensively since  Kyle  and I joined the 49ers ” General Manager John Lynch said.
“ Kyle  ” in this case  is  San Francisco Coach Kyle Shanahan  — you know  the former offensive coordinator of the Washington Redskins  the son of the head coach here who drafted Kirk Cousins.
Here are the people most directly affected by Monday’s trade: Garoppolo  incumbent 49ers quarterbacks Brian Hoyer (who was released) and C.J. Beathard  and  Shanahan   still pursuing  his  first victory as a head coach as the season heads to the second half. Next on that list: I’d argue it’s Cousins.
In the popular parlor game of “Where Will Kirk End Up?” San Francisco has toggled with the Los Angeles Rams (whom we’ll get to) as the leading destination because of the ties those franchises now have to Cousins’s career. We know the links: When  Shanahan  was the Washington offensive coordinator under  his  father  Mike  the team traded up to select Robert Griffin III in the 2012 draft — but then shrewdly spent a fourth-round pick on Cousins that same draft.

SOLUTION: Kyle Shanahan

PROBLEM: The social network  said Thursday that  it 's overhauling the news feed prioritize posts from family and friends  as opposed to ones from brands and publishers.
"I'm changing the goal I give  our  product teams from focusing on helping you find relevant content to helping you have more meaningful social interactions  " CEO Mark Zuckerberg  wrote on  his  Facebook page.
You can read  Zuckerberg 's post below:
One of our big focus areas for 2018 is to make sure that the time we all spend on Facebook is time well spent. We built... Posted by  Mark Zuckerberg  on Thursday  January 11  2018
 He  also acknowledged that  the company 's business could take a short-term hit as a result of the change -- but it was an important move to make anyway.
"By making these changes  I expect the time people spend on Facebook and some measures of engagement will go down. But I also expect the time you do spend on Facebook will be more valuable "  he  wrote. "And if we do the right thing  I believe that will be good for our community and our business over the long term too."

SOLUTION:
Zuckerberg