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].

Robert Dudley  who will replace Tony Hayward on Oct. 1  promised changes in light of the environmental disaster. "There's no question we are going to learn things from this investigation of the incident " he said.
 Hayward has some sympathy in his native Britain  where many pensions rely on BP stock and some consider U.S. outrage at the company to be over the top. A recurring theme in newspaper editorials and discussions among many Britons is that there simply wasn't much one man could do in the face of relentless American wrath.
 "BP sends Tony Hayward to Siberia to appease US " read a headline in the Guardian.
 Hayward  who will stay on BP's board until Nov. 30  will receive a year's salary of 1.045 million pounds (US$1.6 million) as part of his severance package. His pension benefits are valued at about 11 million pounds (US$16.8 million)  and he retains his rights to shares under a long-term performance program that could eventually be worth several million pounds if BP's share price recovers.
 Hayward said it was right that BP embark on its next phase under new leadership  and expressed his condolences for the families of the workers killed in the explosion.
 "The Gulf of Mexico explosion was a terrible tragedy for which -- as the man in charge of BP when it happened -- I will always feel a deep responsibility  regardless of where blame is ultimately found to lie " he said.
 President Barack Obama  who once said he would fire Hayward if he could  discussed the change in BP's leadership with Svanberg on Monday  Gibbs said Tuesday. No details about the conversation were released.
 Dudley spent some of his childhood in Mississippi and worked for 20 years at Amoco Corp.  which merged with BP in 1998. He lost out to Hayward on the CEO slot three years ago.
Hayward if he could  discussed the change in BP's leadership with Svanberg on Monday  Gibbs said Tuesday. No details about the conversation were released.
 "Our concern is not who heads BP " Gibbs said. "Mr. Hayward is leaving. The key is that BP can't leave and should not leave the Gulf. ... They have obligations and responsibilities as the responsible party in this instance that have to be met regardless of who the CEO is."
Tony Hayward

Bill Polian   Hall of Fame executive.  His  status as a prognosticator is less solid. (NFL Network)
 Bill Polianâs  track record is undeniable. As general manager of the Buffalo Bills   he  cobbled together the lineups that advanced to four straight Super Bowls. With  Polian  at the personnel helm  the expansion Carolina Panthers advanced to the NFC championship game in just their second year of existence.  Polian  then concluded  his  career by shaping the Indianapolis Colts into a Super Bowl winner.
 He âs in  the Hall of Fame  and deserves to be  even if  his  post-football career as an ESPN analyst has been  shall we say  slightly less successful in the prediction department.
 Polian âs latest forecast involves Louisville quarterback Lamar Jackson  who  he  says is too short â at 6-foot-3 â and not accurate enough to be a successful NFL quarterback.
âI think wide receiver â  he  said  when asked about what NFL position Jackson should play Monday on ESPNâs âGolic and Wingo.â âExceptional athlete  exceptional ability to make you miss  exceptional acceleration  exceptional instinct with the ball in his hand  and that âs  rare for wide receivers. That âs  [Steelers wideout Antonio Brown] and who else  name me another one whoâs like that  right? Julio [Jones] is not like that. This guy is incredible in the open field and [has] a great ability to separate and  again  heâs short and a little bit slight and clearly  clearly not the thrower that the other guys are. His accuracy isnât there  so I would say  donât wait to make that change  donât be like the kid from Ohio State [Terrelle Pryor] and be 29 when you make the change.â
Anyway  it wouldnât be the first time  Polian  has been wrong.
 Polian  on Johnny Manziel
 Bill Polian : Johnny Manziel has magic. If you're in the Browns draft room  you owe it to the fans to consider taking him at 4. #SXMNFL â SiriusXM NFL Radio (@SiriusXMNFL) April 30  2014
 Polian  on Deshaun Watson
 Polian  on Robert Griffin III
 Polian  on Kirk Cousins and the Redskins
Bill Polian

Then  last week  reader David P. pointed me to a column by  Barry Nussbaum   chief statistician at the EPA for over a decade and currently president of the American Statistical Association. As soon as I read it I called  Nussbaum   who was a young EPA analyst in the late 70s when heâwell  weâll get to that. First  though  the answer to my question.
According to  Nussbaum   EPA wanted places like California to reduce smog  and that meant cars would have to be fitted with catalytic converters. However  since gasoline lead ruins catalytic converters  refineries needed to produced unleaded gasoline. This was the initial impetus behind unleaded gasoline. The fact that it also reduced atmospheric lead was basically a happy accident.
The first itemâunfortunately for HUDâsuggested that lead poisoning was not correlated with lead paint in housing. After all  thereâs no reason to think that kids are exposed to more lead paint in the summer. The second item suggests that lead poisoning is correlated with gasoline lead.Â² And the third item immediately convinced Carter to continue the lead phasedown. âHe stated he did not want any policy that might have a particularly deleterious effect on these two groups â  Nussbaum  says.
On a statistical note   Nussbaum  adds this: âWith the benefit of hindsight  Carter was concerned about the harmful effects on minority populations. Would he have even have known this if the graph just had one composite line for blood lead?â Maybe not. Sometimes flukes of data presentation are all it takes to influence public policy.
Â¹If youâre wondering why the chart doesnât show white children  the answer is lost to history.  Nussbaum  thinks it might have something to do with the limits of plotting technology at the time. In any case  everyone knew what the line looked like: just like the other two  but lower.

Barry Nussbaum