Question: Peter Vilandos is a Greek-American professional poker player, he has won three bracelets at which series of poker tournaments held annually in Las Vegas and, since 2005, sponsored by Caesars Entertainment Corporation?
Context: Peter Vilandos is a Greek-American professional poker player.  He was born in Greece and now resides in Houston, Texas.  He has won three bracelets at the World Series of Poker. The World Series of Poker Europe (WSOPE) is the first expansion effort of World Series of Poker-branded poker tournaments outside the United States.  Since 1970, participants had to travel to Las Vegas if they wanted to compete in the World Series of Poker (WSOP).  Although the WSOP held circuit events in other locations, the main tournaments, which awarded bracelets to the winners, were exclusively held in Las Vegas.  The inaugural WSOPE, held in 2007, marked the first time that a WSOP bracelet was awarded outside of Las Vegas.  From its inception to the 2013 tournament, players from 19 countries — USA (10), France (4), UK (3), Denmark (3), Canada (2), Norway (2), Portugal (2), Italy (2), Afghanistan, Germany, Indonesia, Spain, New Zealand, Sweden, Tunisia, Switzerland, Australia, Italy and Finland — have won bracelets. The 1993 World Series of Poker (WSOP) was a series of poker tournaments held at Binion's Horseshoe.  Poker professionals Phil Hellmuth and Ted Forrest would both win three bracelets during the 1993 Series. The World Series of Poker Europe (WSOPE) is the first expansion effort of World Series of Poker-branded poker tournaments outside the United States.  Since 1970, participants have had to travel to Las Vegas if they wanted to compete in the World Series of Poker (WSOP).  Although the WSOP held circuit events in other locations, the main tournaments, which awarded bracelets to the winners, were exclusively held in Las Vegas.  The inaugural WSOPE, held in 2007, marked the first time that a WSOP bracelet was awarded outside Las Vegas. Athanasios Polychronopoulos (born 1984) is a Greek-American professional poker player who won World Series of Poker bracelets at the 2011 and 2013 World Series of Poker. The World Series of Poker Europe (WSOPE) is the first expansion effort of World Series of Poker-branded poker tournaments outside the United States.  Since 1970, participants have had to travel to Las Vegas if they wanted to compete in the World Series of Poker (WSOP).  Although the WSOP held circuit events in other locations, the main tournaments, which awarded bracelets to the winners, were exclusively held in Las Vegas.  The inaugural WSOPE, held in 2007, marked the first time that a WSOP bracelet was awarded outside Las Vegas. The World Series of Poker Africa (WSOPA) is the second expansion effort of World Series of Poker-branded poker tournaments outside the United States.  Since 1970, participants had to travel to Las Vegas if they wanted to compete in the World Series of Poker (WSOP).  Although the WSOP started holding circuit events in 2005 in other states, the main tournaments, which awarded bracelets to the winners, were exclusively held in Las Vegas.  In 2007, the inaugural World Series of Poker Europe marked the first time that a WSOP bracelet was awarded outside of Las Vegas.  In 2010, the WSOP expanded overseas once again, only this time to Gauteng, South Africa.  While the WSOPE awarded bracelets, the WSOPA was considered a circuit event with the winners receiving Championship Rings instead of bracelets.  The WSOPA did not occur in 2011, but the series of tournaments resumed in 2012. The World Series of Poker Europe (WSOPE) is the first expansion effort of World Series of Poker-branded poker tournaments outside the United States.  Since 1970, participants have had to travel to Las Vegas if they wanted to compete in the World Series of Poker (WSOP).  Although the WSOP held circuit events in other locations, the main tournaments, which awarded bracelets to the winners, were exclusively held in Las Vegas.  The inaugural WSOPE, held in 2007, marked the first time that a WSOP bracelet was awarded outside Las Vegas. The World Series of Poker (WSOP) is a series of poker tournaments held annually in Las Vegas and, since 2005, sponsored by Caesars Entertainment Corporation (known as Harrah's Entertainment until 2010).  It dates its origins to 1970, when Benny Binion invited seven of the best-known poker players to the Horseshoe Casino for a single tournament, with a set start and stop time, and a winner determined by a secret ballot of the seven players. The World Series of Poker Asia Pacific (WSOP APAC) is the third expansion of the World Series of Poker-branded poker tournaments outside the United States.  Since 1970 participants have had to travel to Las Vegas, Nevada to compete in the World Series of Poker (WSOP).  Although the WSOP started holding circuit events in 2005 in other states, the main tournaments, which awarded bracelets to the winners, were exclusively held in Las Vegas.  In 2007 the inaugural World Series of Poker Europe marked the first time that a WSOP bracelet was awarded outside Las Vegas.  The WSOP further expanded to Africa in 2010 and 2012 however these events did not award any bracelets.
Answer: World Series of Poker