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]: 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]: Legendary rocker  Tom Petty  is dead at 66.
The legendary rocker best known as the frontman of  Tom Petty  and the Heartbreakers suffered a full cardiac arrest and was found unconscious and not breathing in  his  Malibu home Sunday night  CBS News has confirmed.
 He  was taken to UCLA Santa Monica Hospital and put on life support  reports TMZ.
 Petty  rose to fame in the 1970s with  his  band  recording several hits  including "American Girl " "Free Fallin' " "Breakdown " and "Listen to Her Heart."
 Petty  had just ended a 40th anniversary tour  playing  his  last show last Monday  the last of three sold-out shows at the Hollywood Bowl. Late in August   he  canceled a show for what  his  manager said was laryngitis.
Last year   Petty  told Rolling Stone it would likely be the group's last tour together.
"I'd be lying if I didn't say I was thinking this might be the last big one "  he  said. "We're all on the backside of our sixties. I have a granddaughter now I'd like to see as much as I can. I don't want to spend my life on the road. This tour will take me away for four months. With a little kid  that's a lot of time."
 Petty   released 13 albums with  Tom Petty  and the Heartbreakers  three solo albums and took part in the 1980s supergroup the Traveling Wilburys with Bob Dylan  George Harrison  Roy Orbison and Jeff Lynne.
[EX A]: Tom Petty

[EX Q]: Halsey  raised  her  voice Saturday at the Women’s March in New York to shed light on sexual assault  rape and a culture rooted in misogyny.
 Halsey  delivered one of Saturday’s most poignant moments when  she  recited an original poem about sexual assault. (Erik Pendzich/REX/Shutterstock/Erik Pendzich/REX/Shutterstock)
“A Story Like Mine” shares  Halsey ’s personal experiences with sexual assault  which include being assaulted as a child  accompanying her best friend to Planned Parenthood  being forced by a boyfriend to have sex  and performing after having a miscarriage.
 Halsey  also addresses how  she  believed  her  fame could protect  her  from being assaulted  but that  she  realizes “nobody is safe (as) long as  she  is alive.”
 Halsey 's powerful poem had some choice words for President Trump. (Evan Vucci/AP)
“And that’s why we’re here  and that’s why we rally ”  Halsey  read  “It’s Olympians and a medical resident and not one f---ng word from the man who is President.”
Although  Halsey ’s poem explores past traumas  “A Story Like Mine” ends on a hopeful note.
This is extraordinary. Thank you @Halsey for your art  your words  your ferocity. [Link] — Debra Messing (@DebraMessing) January 21  2018
Katy Perry  Reese Witherspoon  Debra Messing and other celebrities praised Halsey's poem on social media.
[EX A]:
Halsey