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].
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Question: 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.

Answer: David Letterman


Question: California Gov. Jerry Brown (D)  delivers  his  final State of the State address in Sacramento on Jan. 25. Democrats who want to replace  him  are aiming even further left in a state already known for its liberal politics. (Pool/Reuters)
Here in the self-labeled âstate of resistance â the political debate is being pushed further left without any sign of a Republican renaissance to serve as a check on spending and social policy ambitions. Even some Republicans are concerned about the departure of Gov. Jerry Brown (D)  who proved to be fiscally cautious after inheriting a state seven years ago in deep recession.
âYou are going to be talking about Democrat-on-Democrat crime  for the most part â said Bill Whalen  a research fellow at Stanford Universityâs Hoover Institution. âWhat also is certain is that the next governor is going to be more progressive than Jerry Brown.â
In his final State of the State address on Jan. 25   Brown  said California is âprospering â a nod to a growing economy that is the sixth-largest in the world.
But in an interview after the speech   Brown  said that âdoes not mean all Californians are prospering â and  he  made a distinction between the coastal âconsulting classâ and rural laborers whose âculture of working with their handsâ is disappearing.
âThe state is more divided â  Brown  said. âAnd itâs divided this way right across the country.â
 Brown  said  he  is uncertain whether  he  will endorse in the race to succeed  him   even though Newsom also is a Bay Area Democrat who  on climate change in particular  supports the governorâs policies. Some of  Brown âs transportation initiatives  including a high-speed rail project from Los Angeles to San Francisco that is bursting its budget  remain in question.
âI donât think the people of Tulare County or Modoc County want to hear from  Jerry Brown  on who to vote for. Maybe the people in Oakland would  I donât know â  Brown  said. âIâll decide what to do based on 45 years of campaigning in this state.â

Answer: Jerry Brown


Question: BEIRUT (Reuters) - Syriaâs army and its allies will keep fighting in Syria after the battle ends in Deir al-Zor province  where Islamic State has its last significant stronghold   President Bashar al-Assad  said on Tuesday.
âThe victories against terrorist organizations  starting in Aleppo and not ending in Deir al-Zor  formed a critical strike that foiled partition projects and terrorist goals â  Assad âs office quoted  him  as saying.
 Assad  regards all the groups fighting against the Syrian state as terrorist groups.
 Assad  said in  his  meeting with Velayati that the battle would last âuntil the recovery of security and stability to all Syrian landsâ   his  office said.

Answer:
Assad