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: After enduring one too many maddeningly slow boarding experiences  Jason Steffen a professor of physics and astronomy at the University of Nevada Las Vegas  began digging into the unexpectedly complicated mechanics of efficiently ushering passengers onto planes.
In 2008   Steffen  created a computer simulation to evaluate existing boarding methods and ultimately design what  he  claims is the most efficient option for getting restless passengers into their seats. The results were published several years ago in the Journal of Air Transport Management (summarized here).
In  his  research   Steffen  identified the two most common factors responsible for slowing the boarding process to a painful crawl:
In fact  the most routine boarding process â from back to front â is actually the slowest of them all   Steffen âs argues  Itâs even less efficient than boarding a plane in a completely random order.
 Steffen  claims that  his  proposed method  which minimizes the former issue and eliminates the latter  could significantly reduce boarding times  thus cutting down on overall door-to-door flight lengths  and ultimately saving airlines hundreds of millions of dollars a year.

A: Jason Steffen
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Q: BRUSSELS/FRANKFURT (Reuters) - The European Central Bank will only stop pumping cash into the euro zone economy when it is confident that inflation is heading toward its target even without its extra help   the ECBâs chief economist Peter Praet  said on Monday.
Praet  one of the architects and sponsors of the ECBâs 2.55 trillion-euro ($3.17 trillion) bond-buying program  was responding to growing calls by some rate-setters to stop the scheme  which has been blamed for fuelling bubbles in the property and bond markets.
 Praet  said that before making any such decision the ECB needed to be confident that inflation was trending toward its inflation target of almost 2 percent and that it could withstand a withdrawal of stimulus.
âOnce the Governing Council judges that the three criteria for sustained adjustment have been met  net asset purchases will expire  in line with our guidance â  Praet  told an event in Brussels.
 He  also added the ECB had not decided yet how to end the asset purchase program  whether gradually or at once.
Asset purchases âcan expire at once or they can expire in a more gradual way. I think this is still one of the things the Governing Council has to discuss â  he  said.
âEven if incoming data were to validate the expectation of a gradual build-up of inflationary pressures  this would not be sufficient to affirm a sustained adjustment  if even less supportive monetary policy conditions were to imperil the inflation trajectory  Praet said.

A: Praet
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Q: Step aside  rose gold â this is a job for old-school Minnie Mouse.
The sparkly headbands  which just hit stores last week  are much more than just a trend â theyâre a little piece of fashion history. The new pastel ear headbands are inspired by  the Minnie Mouse of yesteryear   referencing her appearance in color animations in the mid-1930s and early 1940s.
The sequined blue polka dot ears match her original skirt design â which would later be swapped out for the classic red we know today â while the little wire daisy is a style  Minnie  would regularly sport poking out from atop  her  favorite red hat.
The ears are available at shops throughout Disneyland and Walt Disney World for $24.99  and if you see them  move quickly â if itâs anything like we witnessed this summer  these vintage  Minnie  ears will soon be flying off store shelves.
This throwback  Minnie  souvenir is just the latest in a run of fan-favorite merchandise coming out of the Disney parks. Guests waited in hour-long lines to snag a popcorn bucket in the shape of Oogie Boogie from "The Nightmare Before Christmas" back in September  and last monthâs Pluto popcorn bucket  which features the pup in an ugly Christmas sweater and Santa cap  has been eagerly snapped up by fans on both coasts.

A:
Minnie Mouse
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