Question: In which year was the National Rugby League team coached by Anthony Seibold first defeated in a grand final ?

text: National Rugby League
Coaches
See also : List of current NRL coaches
The National Rugby League (NRL) is a league of professional men's rugby league teams in Australia. Run by the Australian Rugby League Commission, the NRL's main competition is known as the Telstra Premiership due to sponsorship from Telstra and is contested by sixteen teams, fifteen of which are based in Australia with one based in New Zealand. It is the most viewed and attended rugby league club competition in the world. The National Rugby League is Australia's top-level domestic men's rugby-league club competition. It contains clubs from the original Sydney club Rugby League competition, which had been running continuously since 1908. The NRL formed in the aftermath of the 1990s' Super League war as a joint partnership between the Australian governing body, the Australian Rugby League (ARL) and media giant News Corporation-controlled Super League, after both organisations ran premierships parallel to each other in 1997. This partnership was dissolved in February 2012, with control of the NRL going to the independently formed Australian Rugby League Commission. NRL matches are played in Australia and New Zealand from March to October. The season culminates in the premiership-deciding game, the NRL Grand Final, traditionally one of Australia's most popular sporting events and one of the world's largest attended sporting championship games[citation needed]. In addition, the NRL premiers also play in the World Club Challenge, a pre-season match against the champions of the Super League competition. The reigning premiers are the Sydney Roosters winning their fifteenth premiership and becoming the first team to win back-to-back titles since the inception of the unified league.
Name Club Year beginning tenure Year as head coach of Club Previous clubs
Anthony Seibold Brisbane Broncos Beginning 2019 1st Year South Sydney ( 2018 )
Ricky Stuart Canberra Raiders Beginning 2014 6th Year Sydney Roosters ( 2002-06 ) Cronulla ( 2007-10 ) Parramatta ( 2013 )
Dean Pay Canterbury-Bankstown Bulldogs Beginning 2018 2nd Year -
John Morris Cronulla-Sutherland Sharks Beginning 2019 1st Year -
Justin Holbrook Gold Coast Titans Beginning 2020 1st Year St Helens R.F.C . ( 2017-19 )
Des Hasler Manly Warringah Sea Eagles Beginning 2019 1st Year Manly Sea Eagles ( 2004-11 ) Canterbury-Bankstown Bulldogs ( 2012-17 )
Craig Bellamy Melbourne Storm Beginning 2003 17th Year -
Adam O'Brien Newcastle Knights Beginning 2020 1st Year -
Stephen Kearney New Zealand Warriors Beginning 2017 3rd Year Parramatta Eels ( 2011-12 )
Paul Green North Queensland Cowboys Beginning 2014 6th Year -
Brad Arthur Parramatta Eels Beginning 2014 6th Year -
Ivan Cleary Penrith Panthers Beginning 2019 1st Year NZ Warriors ( 2006-11 ) Penrith Panthers ( 2012-15 ) Wests Tigers ( 2017-18 )
Wayne Bennett South Sydney Rabbitohs Beginning 2019 1st Year Canberra ( 1987 ) Brisbane ( 1988-08 ) St. George-Illawarra ( 2009-11 ) Newcastle ( 2012-14 ) Brisbane ( 2015-18 )
Paul McGregor St George-Illawarra Dragons Beginning May 2014 6th Year -
Trent Robinson Sydney Roosters Beginning 2013 7th Year Catalans Dragons ( 2011-12 )
Michael Maguire Wests Tigers Beginning 2019 1st Year Wigan Warriors ( 2010-11 ) South Sydney ( 2012-17 )