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: Chiefs OLB Justin Houston (50) and DL Chris Jones sack Broncos QB Trevor Siemian on Monday night. (Photo: Ed Zurga  AP)
KANSAS CITY  Mo. â  Justin Houston âs once-perfect team had lost consecutive games after a pair of uncharacteristic showings. The Kansas City Chiefs defense couldnât stop anybody  and the offense suddenly lost its effectiveness in the rushing department  which had served as a calling card during the team's 5-0 start.
 Houston   a seventh-year veteran and one of the longest-tenured Chiefs  looked around the locker room  diagnosed the problem and decided he had to speak up.
âIâm from a big family  so I understand there are times to follow  and there are times to lead. There are times to speak up â  Houston  told USA TODAY Sports after Monday night's 29-19 defeat of the Denver Broncos. âWe just werenât having fun.
And  most importantly to  Houston  and his teammates  the Chiefs had fun in the process.
Example Output: Justin Houston

Example Input: Chui's election was a formality  as he was the only candidate. He won the support of 282  or 94 percent  of the southern Chinese city's 300-strong chief executive electoral committee  formed mostly by people with ties to Beijing.
 Chui said after Sunday's vote that the city needed to do more to reduce its economic reliance on the casino business.
 "Since we opened up the gaming market  we have seen a big change in the operation mode and the scale of the business " he told reporters.
 Chui said that he would actively develop the convention  Chinese medicine  logistics  and education sectors.
 He also said he planned to work to attract more Taiwanese tourists to Macau  taking advantage of recently improved relations between Beijing and Taipei.
 The new Macau leader has also pledged to fight corruption  which has cast a shadow over the territory's success.
Example Output: Fernando Chui

Example Input: Russian Prime Minister Vladimir Putin said in an interview published Monday he was "surprised" by the second trial of jailed oil magnate Mikhail Khodorkovsky  widely seen as orchestrated by the Kremlin.
 Interviewed by the daily Kommersant  Putin said he was surprised when prosecutors in 2008 announced fresh charges against the former Yukos chief that could see him serve two more decades in jail.
 "When I heard about the second trial  I was very surprised and asked what case this was  since he is already serving time for what he did. What is this second trial?" Putin said.
 At the time of his arrest in 2003  Khodorkovsky  once Russia's richest man  was seen as a political rival to Putin.
 Putin denied having involvement in the case and said he supported the second trial. "If such a case is being heard  it means that the law requires it. I'm not in charge of this case " he said.
 Asked by the paper why he "hounded Khodorkovsky into a corner " Putin denied the charge.
 "He is being justifiably punished " Putin said. "He will come out of prison and he will be a free man. No  I definitely never pushed him into a corner."
Example Output:
Putin