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:
He âs back!
Legendary talk show host  David Letterman âs new Netflix show  âMy Next Guest Needs No Introduction â debuts Jan. 12  and former President Barack Obama is slated to be the first guest.
âI had a show for a long time and then I didnât have a show for a long time  and I canât tell you how great it is to be out of the damn house â  Letterman  jokes in the trailer.
The trailer doesnât indicate what  Letterman  and Obama will talk about  but itâs possible the current administration will be a hot topic on the series considering  Letterman  has spoken out against President Donald Trump.

Ex Output:
David Letterman


Ex Input:
Zimbabwe's new President Emmerson Mnangagwa has appointed a new Cabinet that includes ruling party loyalists as well as figures linked to the military  whose takeover helped oust  former leader Robert Mugabe .
No opposition politicians are included in the list  which has been seen as the first test of whether Mnangwgwa  a longtime  Mugabe  ally  would move out of his shadow.
Moyo on Nov. 15 announced the military takeover that put  Mugabe  under house arrest and set in motion a national clamor leading to the former president's resignation after 37 years in power.
 Mugabe  quit Nov. 21 amid impeachment proceedings.  The ruling ZANU-PF party  replaced  him  with Mnangagwa  who was fired weeks ago as one of the country's vice presidents.
For some Zimbabweans who had hoped that  the new leader  would make the Cabinet more inclusive  Thursday night's announcement was seen as a disappointment.

Ex Output:
Robert Mugabe


Ex Input:
Opposition sympathiser and powerful cleric Akbar Hashemi Rafsanjani has ratcheted up the pressure on the Iranian regime ahead of the first anniversary of the disputed presidential election.
 The reappearance of Rafsanjani's comments comes just days before the June 12 anniversary of the presidential poll that returned Mahmoud Ahmadinejad to power and sparked one of the worst internal crises in the Islamic republic's history.
 Iran was rocked by widespread and deadly street unrest immediately after Ahmadinejad's re-election -- a result his opponents said had been rigged.
 Now Rafsanjani's website has again reproduced the text of his year-old letter to Khamenei in which he warned of social upheaval if the leader remained silent about a remark Ahmadinejad made before the election.
 In a television debate just days before the poll  Ahmadinejad accused Rafsanjani's family of corruption  prompting the cleric to send his letter of complaint to the supreme leader.
 Addressing Khamenei in such a manner is unheard of in Iran where the supreme leader is the ultimate authority and has the final say on all strategic issues.
 The Rafsanjani website also repeated remarks he made during a Friday prayer sermon last July 17 as the post-election unrest raged  when he openly said the election result had broken the trust of Iranians.
 "What should we do?" Rafsanjani asked rhetorically in the sermon. "Our key issue is to return the trust which the people had and now to some extent is broken.
 "It is not necessary that in this situation people be jailed. Let them join their families. We should not allow enemies to rebuke and ridicule us because of detentions. We should tolerate each other " he said.
 Rafsanjani is a sympathiser of the opposition  especially Mir Hossein Mousavi who was runner-up in the presidential election.
 Meanwhile Rafsanjani's daughter Faezeh  who heads an Islamic federation of female sports  issued a statement denouncing an "attack against her office overnight Friday " the opposition Rahesabz.net website reported.

Ex Output:

Akbar Hashemi Rafsanjani