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 Input:
Rihanna  has emerged as the unlikely inspiration behind Arsenal's thumping 5-1 win against Everton.
 The singer  was at the Emirates to watch the match and enjoy the Gunner's work  work  work  work  work ethic.
After the match   she  posed with midfielder  Mesut Ozil  who described  her  as the team's "lucky charm".
The German said he was "still unbeaten with Riri" - a reference to when  she  came to watch the 2014 World Cup Final between Germany and Argentina.
Ozil himself couldn't get on the scoresheet but with  Rihanna  pulling the inspirational strings during a pre-match meet and greet  other players stepped up.
It's just a shame that whoever was looking after  her  social accounts still referred to the game as "soccer".
After the game  manager Arsene Wenger seemed to play down the importance of  Rihanna 's contribution  focusing instead on his side's "penetration and sharper game".
Given Arsenal's up and down season  there are probably high level talks with  Rihanna 's people to see if  her  schedule allows any more trips to watch the team - with one eye surely on  their  next Europa League match  away at Ostersunds FK.

Ex Output:
Rihanna


Ex Input:
The White House confirmed Sunday that  Russian President Vladimir Putin  spoke with President Donald Trump in what Russian state media has described as a thank-you call following a CIA tip about a bomb threat in St. Petersburg.
Russia's main state broadcaster  Vesti  said Sunday that  Putin  called Trump to thank  him  for a CIA tip that helped Russian police thwart a terrorist attack in St Petersburg.
According to  Vesti  Putin  asked Trump to thank CIA Director Mike Pompeo for providing the information  and  he  told the U.S. president that "the Russian security services  in the case where they receive information regarding terrorist threats in relation to the U.S. and its citizens  will without question and immediately pass it to their American colleagues."
White House press secretary Sarah Sanders confirmed the call from Putin to Trump took place and said a readout would be provided to the press shortly.

Ex Output:
Putin


Ex Input:
The Trump administration has told lawmakers that  it  wants $18 billion over the next decade for the initial phase of a Mexico border wall  laying out for the first time a detailed financial blueprint for the president's signature campaign promise.
"President [Donald]  Trump  has said  he  may need a good government shutdown to get  his  wall. With this demand   he  seems to be heading in that direction " said Sen. Dick Durbin of Illinois  the ranking Democrat on the Senate Judiciary Committee's immigration subcommittee.
Though  Trump  ran for office on a promise that Mexico would pay for a border wall  the spending plan indicates American taxpayers would fund it for at least the foreseeable future.
 Trump  has told Democrats  he  is unwilling to reach an agreement unless they fund  his  wall plan  among other measures  but the CBP document is the first time  his  administration has sketched out what that might cost.
Democrats have repeatedly said they will not pay for a wall. Even though on a year-over-year basis the CBP request would not represent a dramatic funding increase over current border spending levels  it would represent a long-term commitment to a physical structure that  Trump  would be able to claim as a political trophy.
" Trump  can have a shutdown fight over  his  stupid wall that pleases the nativists in  his  base  or  he  can have a breakthrough that pairs the Dream Act and border security so  he  can brag  he  did something Obama couldn't get done.  He  can't have both " said Frank Sharry  executive director of America's Voice  an immigrant advocacy group. "This move by the White House does not bode well."
 Trump  has said  he  may travel to San Diego to inspect the prototypes  which range in height from 18 to 30 feet and combine different formulations of see-through steel bars  concrete slabs and metal spikes.

Ex Output:

Donald ] Trump