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]: Tesco CEO Dave Lewis  says EU exit won’t affect choice or quality but says prices are being squeezed.
 Lewis  says: “A no deal scenario  if there were to be tariffs  then actually that could impact the price of food.”
However  Tesco boss Dave Lewis admitted that the Brexit-driven collapse in the pound is pushing up prices and warned that failure to secure a deal with the EU by the March 2019 Brexit deadline could lead to higher food prices across the UK.
 Lewis  was speaking at a press conference following the release of Tesco’s half-year results  which showed sales up by 3.3% and operating profit up 27.4%. Prices rose in the period but  Lewis  was quick to point out that price rises were around 1% lower than competitors.
However  while  Lewis  disagreed with King’s assessment of Brexit   he  admitted that price rises could get worse if Britain fails to reach a deal with the EU on trading terms before the March 2019 leaving deadline.
[A]: Dave Lewis


[Q]: Washington (CNN) House Minority Leader Nancy Pelosi on Sunday refused to criticize Rep. John Conyers  a Michigan Democrat who has been accused of sexual harassment against former Capitol Hill staff.
 "John Conyers  is an icon in our country.  He 's done a great deal to protect women "  she  added  citing  the congressman 's support for the Violence Against Women Act.
 Conyers  faces a House Ethics Committee investigation over allegations that  he  sexually harassed and discriminated against members of  his  staff. Last week  Buzzfeed News reported that  Conyers  settled a wrongful dismissal complaint in 2015 for allegedly sexually harassing a staffer.  Conyers  has "expressly and vehemently" denied any wrongdoing.
Pelosi  D-California  placed responsibility on the House Ethics Committee to investigate the allegations  and for  Conyers  to "do the right thing."
An attorney for  Conyers  told CNN on Wednesday that the congressman will not resign amid the investigation.
Asked by host Chuck Todd whether Pelosi would suspend  Conyers  from his role as ranking member of the House Judiciary Committee  Pelosi said: "This all happened during the Thanksgiving break. When we all come together at the beginning of this week  I think John will do the right thing."
Early Sunday afternoon   Conyers  stepped down as ranking member of the House Judiciary Committee.
[A]: John Conyers


[Q]: John McAfee  is interviewed by RT television network. Photograph: Taylor Weidman/Bloomberg
But perhaps the biggest draw on the Blockchain Cruise was  John McAfee   the anti-virus software pioneer with a checkered past. In 2012  while living in Belize   McAfee  had run-ins with local police for alleged unlicensed drug manufacturing and weapons possession  but was released without charge. At one point  Belize police started a search for him as a person of interest in connection with the murder of his neighbor.  McAfee  said  he  was innocent and that  he  fled Belize because of persecution by corrupt officials.
 He  now helps run MGT Capital Investments Inc.  a small-cap tech company with a Bitcoin mining business.  He  has become a cryptocurrency evangelist on Twitter  touting the technology and various tokens to  his  more than 700 000 followers. Coinsbank  the digital currency exchange and wallet operator that organized the cruise  made  him  a headline speaker.
On Wednesday   McAfee  blamed the recent market slump on unfounded fear of government intervention.  He  urged cryptocurrency holders -- one of whom sported a âBuy The Dipâ t-shirt -- to stick with their bets.
âYou cannot force a ban on a distributed system â  McAfee  said in an interview after  his  speech. âItâs like how do you ban smoking weed? You canât ban it. People will come back.â
[A]:
John McAfee