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 Q]: Trump took to Twitter on Tuesday to claim that Tennessee Republican helped "give us" the nuclear deal with Iran negotiated by President Barack Obama's administration. Earlier this month  he claimed that  Corker  is "largely responsible for the horrendous Iran Deal!"
 Corker  the chairman of the Senate Foreign Relations Committee   was in fact a vehement critic of the deal that emerged from international negotiations in the summer of 2015. After the deal was unveiled   he  wrote in an op-ed for The Washington Post that "Congress should reject this deal and send it back to the President."
 Corker  plotted efforts to block the deal  banding with Republicans -- and even some Democrats -- in an attempt to block the deal.
The following month   Corker  did just that  joining with the bipartisan group to vote against the deal. A procedural vote to move forward a resolution to reject the nuclear deal fell shy of the required 60-vote threshold.
Even before that vote   Corker  helped push through the legislation that would ultimately grant Congress powers to review the deal  which the Obama administration contemplated approving without congressional oversight.
 Corker  said such an attempt would be "a direct affront to the American people and seeks to undermine Congress' appropriate role" in a March 2015 letter to Obama.
 Corker 's calls for congressional review of the nuclear deal that was still being negotiated in the spring of 2015 ultimately led to the Iran Nuclear Agreement Review Act  which Obama ultimately signed despite initially opposing the measure.
That could be what White House press secretary Sarah Sanders was referring to on October 10 when she claimed: " Sen. Corker  worked with Nancy Pelosi and the Obama administration to pave the way for that legislation and basically rolled out the red carpet for the Iran deal  and those are pretty factual."
 Corker  defended the bill against that criticism in September 2015  noting that the legislation "actually took power back from the president."
"Without it  he could have unilaterally implemented the deal immediately. The President never would have been forced to submit the agreement to Congress and there would have been no review and no debate on this critical national security issue "  Corker  said then.
Trump's criticism of  Corker  on the Iran deal is also curious given that Trump initially considered  Corker  as a candidate for vice president and later secretary of state  in large part due to his foreign policy chops.
[EX A]: Corker

[EX Q]: Comic strip artist Mort Walker  a World War II veteran who satirized the Army and tickled millions of newspaper readers with the antics of the lazy private "Beetle Bailey " died Saturday.  He  was 94.
 Walker  died at  his  home in Stamford  Connecticut  said Greg Walker  his eldest son and a collaborator. His father's advanced age was the cause of death  he said.
 Walker  began publishing cartoons at age 11 and was involved with more than a half-dozen comic strips in  his  career  including "Hi and Lois " ''Boner's Ark" and "Sam & Silo." But  he  found  his  greatest success drawing slacker Beetle   his  hot-tempered sergeant and the rest of the gang at fictional Camp Swampy for nearly 70 years.
The character that was to become  Beetle Bailey  made  his  debut as Spider in  Walker 's cartoons published by the Saturday Evening Post in the late 1940s.  Walker  changed Spider's name and launched  "Beetle Bailey"  as a college humor strip in 1950.
At first the strip failed to attract readers and King Features Syndicate considered dropping it after just six months   Walker  said in a 2000 interview with The Associated Press. The syndicate suggested  Beetle  join the Army after the start of the Korean War   Walker  said.
"I was kind of against it because after World War II  Bill Mauldin and Sad Sack were fading away " he said. But his misgivings were overcome and  Beetle  "enlisted" in 1951.
 Walker  attributed the success of the strip to Beetle's indolence and reluctance to follow authority.
"Most people are sort of against authority "  he  said. "Here's  Beetle  always challenging authority. I think people relate to it."
 "Beetle Bailey"  led to spin-off comic strip "Hi and Lois " which  he  created with Dik Browne  in 1954. The premise was that  Beetle  went home on furlough to visit  his  sister Lois and brother-in-law Hi.
Fellow cartoonists remembered  Walker  on Saturday as a pleasant man who adored his fans. Bill Morrison  president of the National Cartoonists Society  called  Walker  the definition of "cartoonist" in a post on the society's website.
" He  lived and breathed the art every day of  his  life.  He  will be sorely missed by  his  friends in the NCS and by a world of comic strip fans " Morrison said.
Fellow cartoonist Mark Evanier said on his website that  Walker  was "delightful to be around and always willing to draw  Beetle  or Sarge for any of his fans. He sure had a lot of them."
"Beetle Bailey " which appeared in as many as 1 800 newspapers  sometimes sparked controversy. The Tokyo editions of the military newspaper Stars & Stripes dropped it in 1954 for fear that it would encourage disrespect of its officers. But ensuing media coverage spurred more than 100 newspapers to add the strip.
Shortly after President Bill Clinton took office   Walker  drew a strip suggesting that the draft be retroactive in order to send Clinton to Vietnam.  Walker  said  he  received hundreds of angry letters from Clinton supporters.
For years   Walker  drew Camp Swampy's highest-ranking officer  Gen. Amos Halftrack  ogling his secretary  Miss Buxley. Feminist groups claimed the strip made light of sexual harassment  and  Walker  said the syndicate wanted  him  to write out the lecherous general.
That wasn't feasible because the general was such a fixture in the strip   Greg Walker  said Saturday.  His  father solved the problem in 1997 by sending Halftrack to sensitivity training.
[EX A]: Beetle Bailey

[EX Q]: But when  Sen. Bernie Sanders (I-Vt) and Rep. John Conyers Jr. (D-Mich.)  arrived  there were no waving signs.  They  were there to kick off the push for universal health care  with legislation queued up for September  and no expectation that the Republican-controlled Congress would pass it.
“Every major country in the world   they ’ve already got it ” said Conyers.
“More and more people agree with us ” said  Sanders .
As Washington prepares for a month of spending deadlines  and as Republicans and business groups try to shift the conversation to tax reform   Sanders  is trying to drive a discussion about single-payer health care — a debate that  he  admits would last for years before any legislative action.
The campaign will put the Senate’s only democratic socialist in a unique position. Republicans have already begun attacking Democrats over “government-run health care ” daring them to endorse  Sanders ’s plan. On the left  activists inspired by  Sanders ’s 2016 presidential bid intend to browbeat Democrats who don’t back  Sanders ’s and Conyers’s legislation.
[Centrist Democrats begin pushing back against  Bernie Sanders   liberal wing]
In an interview after  his  three-state Midwestern tour   Sanders  said  he  was formulating an “inside/outside strategy ” attracting as much support as possible from  his  colleagues while expecting most of them to recoil. It would be up to activists to make single-payer politically possible for the holdouts.
In the meantime  as the chair of the Senate Democrats’ political outreach   he  would continue to support colleagues in tough races  even if they rejected  his  bill.
Republicans  looking hungrily at a 2018 Senate map where 10 incumbent Democrats will compete in states won by Trump  were hoping for a litmus test. But in just two states  West Virginia and North Dakota  are incumbents being challenged by progressives in primaries. Neither challenger is being backed by  Sanders .
Still  as  Sanders  wove through Indiana  Ohio and Michigan  local conservatives mocked those states’ Democratic senators  even those who didn’t appear with  Sanders .
When  Sanders  stumped in Ohio’s Scioto County  one of the places that had seen a tight presidential race in 2012 but delivered a landslide for Donald Trump in 2016  Ohio Republican Party chair Jane Timken pointed out that Sen. Sherrod Brown (D-Ohio) had frequently supported the idea of single-payer health care. (Brown did not appear at the event  though former governor Ted Strickland sat in the front row.)
“The only place Bernie Sanders’ socialist sales pitch will be welcomed today is in Senator Sherrod Brown’s office ” said Timken in a statement. “Scioto County voters rejected socialized health care and the job destroying economic policies of Sanders and Brown last year by overwhelmingly electing President Trump.”
“People are saying ‘the ACA did some good things  and the Republicans wanted to throw 22 million people off of it ’”  Sanders  said. “That’s an absurd idea to most people.”
But single-payer was not going to start with clear partisan support.  Sanders  intends to release a single-payer bill in the Senate  a companion to Conyers’s House Resolution 676  in the weeks after Labor Day.
[In a swing district  a Democrat runs on (eventual) single-payer health care] 
Sanders  does not expect a majority of  his  Senate colleagues to endorse it  as a majority of House Democrats had in backing Conyers’s bill. And  he  admits it would take work  perhaps years of it  to reframe single-payer health care as an aggregate cost-saver  instead of an expensive entitlement in any debate.
[EX A]:
Bernie Sanders