Question: What show hosted by Tom Bergeron did Anna Demidova perform on? 

Context paragraphs:
Best in Film: The Greatest Movies of Our Time: Best in Film: The Greatest Movies of Our Time was a two-hour television special that aired on March 22, 2011, on ABC in the United States.  Hosted by Tom Bergeron and Cynthia McFadden, it was a collaboration between ABC News and "People" magazine that gave American film fans the chance to choose their favorite movies of all time.  The results were presented on the program, which included interviews with some of the stars and directors of the chosen films including Harrison Ford, Anthony Hopkins, and Olivia Newton-John.  It also showed out-takes, screen tests and behind-the-scenes footage.

29th International Emmy Awards: The 29th International Emmy Awards took place on November 19, 2001, at the Sheraton Hotel in New York City, United States, and hosted by American television personality Tom Bergeron.

Dancing with the Stars (U.S. TV series): Dancing with the Stars is an American dance competition television series that premiered on June 1, 2005, on ABC.  It is the US version of the UK series "Strictly Come Dancing".  The show is hosted by Tom Bergeron, alongside Erin Andrews, who became co-host in season eighteen.  Lisa Canning was co-host in the first season, Samantha Harris co-hosted seasons two through nine and Brooke Burke-Charvet in seasons ten through seventeen.  On May 12, 2017, it was announced that the series has been renewed for season twenty six.

Katusha Demidova: Katusha Demidova is a Russian professional ballroom dancer and instructor, now residing in the USA.  She is the 2009, 2010, 2011, 2012, 2013 and 2014 Professional World Ballroom Dance Champion, and also the International Professional, and British Open, Ballroom Champion.  Her partner in these events was Arunas Bizokas.  She is the sister of Anna Demidova who is also a dancer.

28th International Emmy Awards: The 28th International Emmy Awards took place on November 20, 2000, at the Sheraton Hotel in New York City, United States, and hosted by American television personality Tom Bergeron.  The show was broadcast in Turkey, China, Italy, Latin America, Canada and several other countries as well as on the Internet.

Dancing with the Stars (U.S. season 9): Season nine of "Dancing with the Stars" premiered on September 21, 2009.  Executive producer Conrad Green confirmed to Entertainment Tonight that the season would start off with 16 celebrities, with 3 double-eliminations halfway through the season.  Former House Majority Leader Tom DeLay withdrew from the competition in week three; however, Debi Mazar was also eliminated on the same night, replacing the double elimination planned for week five.  Some changes were added this season including a larger cast and relay dances.  Four new dances were introduced to complement the large cast.  Those dances were the bolero, lambada, two-step, and the Charleston.  The cast was unveiled on the Monday, August 17, 2009, edition of "Good Morning America", returning to the announcement format of most seasons past.  Tom Bergeron and Samantha Harris returned as the show's hosts.  Len Goodman, Bruno Tonioli, and Carrie Ann Inaba continue as the judges this season, with Baz Luhrmann appearing as a guest judge in week two, temporarily replacing Len Goodman.  Pro pairings were officially announced on August 24, 2009.  This was Samantha Harris' last season as co-host.

60th Primetime Emmy Awards: The 60th Primetime Emmy Awards were held on Sunday, September 21, 2008, at the newly opened Nokia Theatre in Los Angeles, California to honor the best in U.S. prime time television.  The ceremony was hosted by Tom Bergeron, Heidi Klum, Howie Mandel, Jeff Probst, and Ryan Seacrest (all were nominated in the debut category—Outstanding Host for a Reality or Reality-Competition Program) and televised in the United States on ABC.

Anna Demidova (dancer): Anna Demidova (Russian: Анна Демидова ) (born April 23, 1988) is a Russian-American professional ballroom dancer, actress and model.  She is the winner of the professional dancer competition of "Dancing with the Stars", Season 8, which guaranteed her a spot as a professional dancer in Season 9 and has been featured in many popular magazines worldwide.  Anna is the sister of World Ballroom Dance Champion Katusha Demidova.

Execution of the Romanov family: The Russian Imperial Romanov family (Tsar Nicholas II, his wife Tsarina Alexandra and their five children Olga, Tatiana, Maria, Anastasia, and Alexei) and all those who chose to accompany them into imprisonment – notably Eugene Botkin, Anna Demidova, Alexei Trupp and Ivan Kharitonov – were shot, bayoneted and clubbed to death in Yekaterinburg on the night of 16-17 July 1918.  The Tsar and his family were killed by Bolshevik troops led by Yakov Yurovsky under the orders of the Ural Regional Soviet.  Their bodies were then stripped, mutilated, burned and disposed of in a field called Porosenkov Log in the Koptyaki forest.

Dancing with the Stars (U.S. season 8): Season eight of "Dancing with the Stars" premiered on Monday, March 10, 2009, as part of ABC's spring line-up.  The show generally followed the format of previous seasons, with 13 couples, although there were some changes, including two new dances (Argentine tango and Lindy Hop), and an occasional dance-off between the bottom two couples, in order to determine who will be eliminated.  The show was again hosted by Tom Bergeron and Samantha Harris.  Len Goodman, Bruno Tonioli and Carrie Ann Inaba all returned as judges again this season.

Supporting paragraphs: Anna Demidova (dancer) Dancing with the Stars (U.S. season 8)
Answer: Dancing with the Stars