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: Mariah Carey  reacted to the mass shooting in Las Vegas on Sunday night that left at least 50 dead while being interviewed on live television to discuss  her  upcoming U.K. Christmas shows.
 Carey  appeared on Good Morning Britain when host Piers Morgan asked the pop superstar about the attack  which is the deadliest mass shooting in U.S. history. ( Carey  herself has performed numerous times in Las Vegas as part of  her  residency there.)
âItâs terrible. People are just going out to listen to music because thatâs what they want to do. Theyâre out for the night  and something shocking happens â  Carey  said. âNobody could have expected it  and itâs just wrong. I really donât know what to say.â
 Carey  followed up the interview by tweeting  her  condolences to victims of the Vegas attack.
Horrified to hear about the shooting in #LasVegas. My thoughts are with the victims and their families. Praying for everyone's safety ðð - Mariah Carey (@MariahCarey) October 2  2017
Morgan  for his part  also clarified in later tweets that  Carey âs team had been informed ahead of time the subject would come up.
We told  Mariah 's people before the interview.
 Her  reaction seemed very relevant given  she 's a performer who often has residence in Vegas. [Link] - Piers Morgan (@piersmorgan) October 2  2017
A:
Mariah Carey