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: “Staff are working at a pace that is unheard of (in trade negotiations) ... and any suggestion that we’re not operating beyond a normal pace is just flat wrong ” U.S. trade envoy Robert Lighthizer told reporters.
 Lighthizer  said Canada had “mentioned” the U.S. ruling during talks on Wednesday.
Asked whether the dispute could affect NAFTA talks   Lighthizer  told reporters: “I‘m not saying it doesn’t have an effect on relationships  it does  but not on this negotiation.”
 Lighthizer  said the United States would “hopefully” present draft text by the next round on the thorny issue of rules of origin  which outlines how much of a product needs to originate in a NAFTA country  and on a dispute settlement mechanism.
 Lighthizer  said the U.S. decision on Bombardier still had several stages to go through before it was finalized.
“There are several more stages  we don’t even know whether it is going to be successful  and in addition there are off-ramps in the litigation ”  he  said. “It’s too early to tell.”
 Freeland  has suggested that Canada could walk away from the NAFTA talks over the so-called Chapter 19 dispute mechanism  under which binational panels make binding decisions on complaints about illegal subsidies and dumping. The United States has frequently lost such cases.

Answer: Robert Lighthizer


Question: 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.

Answer: Nicolas Maduro


Question: Serena Williams Will Face Zarina Diyas in Comeback Match at  Indian Wells Image Serena Williams  during a match against Zhang Shuai at the Tie Break Tens exhibition at Madison Square Garden on Monday.  Williams  is set to play her first WTA match in more than a year on Thursday. Credit Kathy Willens/Associated Press 
Serena Williams  is scheduled to play Zarina Diyas of Kazakhstan on Thursday night in Indian Wells  Calif.  in the first round of the BNP Paribas Open   her  first WTA tournament since the birth of  her  daughter.
 Williams   36  has not played a tour event since winning the Australian Open on Jan. 28  2017  when  she  was about two months pregnant.  She  gave birth to  her  daughter  Alexis Olympia Ohanian Jr.  on Sept. 1  and then spent six weeks in bed because of serious complications from childbirth.  She  did not resume practicing until December.
 Williams  officially returned to professional tennis on Feb. 11 by playing a Fed Cup doubles match with  her  sister Venus against the Netherlands. They were beaten  6-2  6-3  by Lesley Kerkhove and Demi Schuurs after the United States had already clinched the victory in the first-round matchup.
 Williams  looked rusty at that event  as  she  did in an exhibition against Jelena Ostapenko in late December.  Williams  also played in the Tie Break Tens exhibition at Madison Square Garden on Monday night.
After more than a year away from the tour   Williams  has no official ranking. If  she  defeats the 53rd-ranked Diyas   she  would face No. 29 seed Kiki Bertens in the second round  with  her  sister Venus a possible third-round opponent.
In an interview with WTATennis.com   Williams ’s coach  Patrick Mouratoglou  said: “The plan is to get back to  her  best level.  She  has been practicing hard for that  and competition is part of the process.  She  needs more than anything to compete and that is why  she  will plan to play Indian Wells and Miami.
“We do not know how much time  she  will need to get  her  best level back  and I think that we should give  her  the necessary time for that without having too much expectations at the start.”
He added that  her  target was to win Grand Slam titles and that he expected Williams to be back to  her  best by the French Open in May.
The Indian Wells tournament also marks the return of Victoria Azarenka.  She  has not played a tour event since Wimbledon last July.  She  has decided not to play outside of California  where  she  lives  until a custody dispute over  her  son  Leo  is resolved. Azarenka  now ranked 204th  will face Heather Watson in the first round  and with a win  would play 13th-seeded Sloane Stephens in the second round.

Answer:
Serena Williams