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: CRAWFORD , Texas -LRB- AP -RRB- -- Military veterans injured during their service are participating in former President George W. Bush 's annual Warrior 100K bike ride at his Central Texas ranch . 
Three buses brought 52 soldiers Saturday to Bush 's Prairie Chapel Ranch in Crawford , about 20 miles -LRB- 32.19 kilometers -RRB- west of Waco , for the seventh annual 100-kilometer -LRB- 62.14-mile -RRB- ride on trails at the ranch .
Example Output: George W Bush

Example Input: The Soros-backed Best for Britain group working to overthrow the government and block Brexit is “undemocratic”  according to  founder Gina Miller .
 Miller  became well-known as an opponent of Brexit after using the Supreme Court to force the Government to seek Parliament’s approval to activate Article 50 of the Lisbon Treaty and kick off the Brexit process  which could have seen MPs vote down the will of the people.
The group is working to build a network of powerful allies to undermine the Government before it can implement the Brexit vote  and  Miller  is insisting the public has the “right to know” who is backing it as it fights the referendum result.
In her statement   Miller  slammed the lack of “transparency about key players’ motivations  agendas and activities”  and urged “those keen to play their part in the Brexit debate to be open and honest about what they stand for  whom they represent and by whom they are funded”.
Example Output: Gina Miller

Example Input: The ruling party of Cambodian Prime Minister Hun Sen claimed a sweeping win in Sunday's elections for the country's Senate  a victory that it assured itself by eliminating any serious opposition from the contest.
Sunday's vote was seen as a foretaste of a scheduled July general election for the National Assembly that is also expected to affirm  Hun Sen's  rule.
 Hun Sen  has been in power for three decades  and while maintaining a framework of democracy  tolerates little opposition.  His  grip seemed shaken by 2013's general election  when the Cambodia National Rescue Party mounted a strong challenge  winning 55 seats in the National Assembly and leaving  Hun Sen 's party with 68.
After last year's commune council elections   Hun Sen's  ruling party then stepped up  its  steady offensive against critics and opponents. Media outlets seen as critical of the government were forced to shut down  and most senior members of the Cambodia National Rescue Party fled the country.
Example Output:
Hun Sen