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].

Example input: At least Raheem Morris finally has the name of the Bucs' starting quarterback in the back of his mind.
 He wants to make sure he made the decision with his head and not just his heart.
 That's why Morris declined to name his choice between Byron Leftwich and Luke McCown on Friday until after one last consultation with his coaching staff.
 After that  Morris said  he would inform the owners  then his team before making the eagerly awaited announcement. Players were off Friday  so an announcement could come this morning.
 "We'll have a decision here in the near future " Morris said. "I think we've got to go with who we think gives us the best chance to win.
Example output: Raheem Morris
Example explanation: Here the main entity is Raheem  Morris since the main topic of the document is about him starting as quarterback.
Q: NBC News and MSNBC fired journalist  Mark Halperin  in the wake of sexual harassment allegations  CNN reported Monday.
According to the report  at least one dozen women have accused  Halperin  of sexual harassment or assault when  he  was the political director at ABC News.
An MSNBC spokesman told CNN on Monday that  Halperin  â previously an NBC News senior political analyst and an MSNBC contributor â was terminated by the network. NBC initially suspended  Halperin  following reports about the allegations.
NBC was just the latest media company to cut ties with  Halperin  due to the allegations. A spokesperson for Showtime said last week  Halperin  would not return to the political show  âThe Circus â if a new season is ordered. Penguin Press dropped a book about the 2016 election that would have been co-authored by  Halperin   and HBO canceled a miniseries that would have been based on that book.
What did  Halperin  say?
In a statement posted on Twitter last week   Halperin  apologized for  his  âaggressive and crudeâ behavior.
âIn recent days I have closely read the accounts of women with whom I worked at ABC News â  Halperin  said in part. âIn almost every case  I have recognized conduct for which I feel profound guilt and responsibility  some involving junior ABC News personnel and women just starting out in the news business.â
A:
Mark Halperin