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]: Justice Department special counsel Robert Mueller broke his own record this week for guilty pleas. On Tuesday  Dutch attorney Alex van der Zwaan appeared in federal court and admitted he had lied to investigators about his contacts with  Donald Trump's former campaign vice chairman  Rick Gates .
On Friday   Gates himself  appeared before a federal judge and confirmed that  he  is changing  his  plea to guilty.  He  had been fighting the case brought against  him  and the former Trump campaign chairman  Paul Manafort  which alleged they laundered millions of dollars and broke other laws related to their work for clients in Ukraine.
 Gates  and Manafort have not been charged with conspiracy to defraud the U.S. by "impairing  obstructing and defeating the lawful functions of the government through fraud and deceit for the purpose of interfering with the U.S. political and electoral processes." That was the charge Mueller leveled at 13 Russians and three Russian companies he says did interfere with the election.
Or the special counsel's office could be laying down one brick in a larger structure. At the very least   Gates'  future testimony against  his  longtime business partner raises the likelihood that Manafort could be convicted of some or all of the charges  he  continues fighting.
Manafort and his lawyers know this. So one of Mueller's strategies in getting  Gates  to turn state's evidence might be to persuade Manafort to do the same and tell what he knows about other people in the Trump campaign orbit.
Or evidence from  Gates  might be what the special counsel's office needs to build a case against Manafort for conspiring in the 2016 Russian interference effort. Or  after years of working with Manafort   Gates  might have other evidence that would permit Mueller to bring new charges against Manafort.
Mueller announced a new indictment in Manafort's case on Friday evening. After  Gates  appeared in federal court Friday to enter his plea  Manafort continued to maintain his innocence and said he remained committed "to defend myself against the untrue piled up charges contained in the indictments against me."
[EX A]: Gates

[EX Q]: Delonda Walker  alerted police Tuesday after suspect Howell Donaldson III  24  handed  her  a McDonald's food bag containing a .40-caliber Glock  which Tampa police later said matched the murder weapon used in all four shootings that occurred in the Seminole Heights neighborhood between Oct. 9 and Nov. 14.
Donaldson allegedly told  Walker  that he planned to leave the state.  Walker  then approached a police officer who happened to be at the Ybor City McDonald's to turn over the bag  officials said.
In a statement read by Buckhorn in a press conference Friday   Walker  said  "receiving a reward never entered my mind."
"I went to work on Tuesday intending to serve customers and do my job. The day turned out very differently "  she  said. "When confronted with this situation  I wanted to do the right thing and I reached out to a nearby police officer."
 Walker  said  she  is "grateful" that  she  was able to assist law enforcement but requested privacy amid the ongoing investigation.
"... I appreciate all the well wishes and kind words from our community "  she  said.
Buckhorn praised Walker for  her  actions.
" She  is what’s right about this city " Buckhorn said.
[EX A]: Delonda Walker

[EX Q]: That may be hard to remember in the thick of winter. But  climate scientist Deke Arndt  points out that even in a warm year  we still have frigid weather that invades from the north. "We still have very cold poles and we still have the same weather systems that pull cold air away from those poles into places where we live "  he  explains.
 Arndt  is part of a team at the National Oceanic and Atmospheric Administration that assesses each year's weather and climate. They note that 2017 is the 21st year in a row in which the average annual temperature was warmer than the average over the 20th century. And the five warmest years for the lower 48 states have all occurred since 2006.
NOAA's assessment acknowledges that part of the rising disaster toll is due to people building more homes and businesses in vulnerable places. That's especially true with recent losses from wildfires and hurricanes. But  Arndt  notes that a warmer world clearly makes some weather worse. "Heat waves  their duration  their intensity  their frequency is going up "  he  says  as is the frequency of very heavy rainfalls.
Oceanographer Antonio Busalacchi says climate models predict more of the same. "The trend is there  it is clearly evident " says Busalacchi  "we are on an upward and warming slope." And it's a slope that increasingly worries not only scientists but insurance companies.  He  says insurance companies have a lot of questions about where the climate is headed. "Where is the risk in the future going to be from regional sea level rise?"  he  asks. "Where is the risk going to be for the increase in Category 3  4 and 5 hurricanes? Where is the risk going to be for straight-line winds?"
[EX A]:
Deke Arndt