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].

[Q]: LONDON (Reuters) -  When Comcast (CMCSA.O) boss Brian Roberts  was weighing up a $31 billion offer for British broadcaster Sky (SKYB.L)  a trip to see Skyâs products in store  and the knowledge of the London cab driver that took  him  there  helped to make up  his  mind.
 Chief Executive Roberts  said the visit was one of a number of things that confirmed Sky as a âjewelâ that his company should try to acquire  as Comcast looks to boost international revenues as growth in the United States slows.
 Roberts  said  he  had closely tracked what Sky had been doing for years  but last November   he  had an unexpected reminder of Skyâs influence as Europeanâs biggest pay-TV provider while in a cab with a colleague.
âI suggested that we jump in a taxi and go to one of the malls and get a demo of Sky in one of their shops. And we had a fabulous experience â  Roberts  told reporters on a call.
 Roberts  said that while the experience wasnât the deciding factor in moving forward with the bid  it reiterated the media groupâs value to the chief executive.
[A]: Brian Roberts


[Q]: Venezuela's  President Nicolas Maduro (C)  speaks during an event related to the Sowing Plan "North Summer 2017" in Araure  Venezuela September 27  2017. Miraflores Palace/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
CARACAS (Reuters) - Venezuela âs President Nicolas Maduro  railed at two of  his  main international critics on Wednesday  chiding Spanish Prime Minister Mariano Rajoy for âmeddlingâ and mocking U.S. President Donald Trump for geographical ignorance.
The United States has recently imposed sanctions on Venezuelan officials and Spain is pressing for the European Union to follow suit as international pressure grows on  Maduro  over  his  record on human rights and democracy.
âWhy is the global right wing so obsessed with our homeland?â  leftist Maduro  responded in an address on state TV.
Lampooning âlittle Marianoâ for mispronouncing his name âMaderoâ   Maduro  said  the conservative leader  should focus instead on Spainâs internal problems  Cataloniaâs independence push  and Europeâs problematic relations with Washington.
âForget talking about Venezuela  which is a homeland of dignity â  Maduro  said. âI reject and repudiate Mariano Rajoyâs meddling  rude  absurd comments against Venezuela.â
 Maduro  faces global criticism that  he  has turned Venezuela into a dictatorship with the creation of an all-powerful Constituent Assembly  jailing of political opponents and quashing of protests this year in which 125 people died.
Having in recent days labeled Trump a âHitlerâ and âimperial emperorâ supporting violent coup-plotters in Venezuela   Maduro  took aim this time at the Republicanâs intellect.
Venezuela's President Nicolas Maduro (C) speaks during an event related to the Sowing Plan "North Summer 2017" in Araure  Venezuela September 27  2017. Miraflores Palace/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
 Maduro  repeatedly calls opposition leaders pawns of the United States intent on toppling  him  by force.  He  says the Constituent Assembly  elected in August in a vote boycotted by the opposition and condemned by various foreign powers  has brought peace to the nation of 30 million.
[A]: Nicolas Maduro


[Q]: I  as President  want people coming into our Country who are going to help us become strong and great again  people coming in through a system based on MERIT. No more Lotteries! #AMERICA FIRST —  Donald J. Trump (@realDonaldTrump) January 14   2018
The new security language is a sharp turnabout from  Trump’s  televised January 9 event  when he urged House judiciary chairman to develop a “bill of love.”
In numerous events   Trump  has said  he  will OK an amnesty — likely with citizenship — for some of the 3.25 million younger ‘dreamer’ illegals  including the 670 000 DACA illegals  providing the Democrats agree to fund the border wall  cancel the visa lottery program and end the chain migration of extended-family members.
Polls show that  Trump ’s American-first immigration policy is very popular.
For example  a December poll of likely 2018 voters shows two-to-one voter support for  Trump ’s pro-American immigration policies  and a lopsided four-to-one opposition against the cheap-labor  mass-immigration  economic policy pushed by bipartisan establishment-backed D.C. interest-groups.
[A]:
Donald J. Trump