Question: The sponsor of the 2007 NRL season is Australia's largest what?
Context: From the 2007 NRL season onwards the National Rugby League decided to introduce Monday Night Football (MNF).  The kick off time for these games was scheduled to be 7pm (Australian Eastern Standard Time).  The NRL also decided to play the last MNF game of a season on a Sunday night rather than on a Monday night. The 1998 NRL season was the 91st season of professional rugby league football in Australia, and the inaugural season of the newly formed National Rugby League (NRL).  After the 1997 season, in which the Australian Rugby League and Super League organisations ran separate competitions parallel to each other, they joined to create a reunited competition in the NRL.  The first professional rugby league club to be based in Victoria, the Melbourne Storm was introduced into the League, and with the closure of the Hunter Mariners, Western Reds and South Queensland Crushers, twenty teams competed for the premiership, which culminated in the 1998 NRL grand final between the Brisbane Broncos and Canterbury Bulldogs. The 2007 NRL season was the one hundredth season of professional rugby league football club competition in Australia, and the tenth run by the National Rugby League.  Sixteen teams contested the NRL's 2007 Telstra Premiership, and with the inclusion of a new team, the Gold Coast Titans, the competition was the largest run since the 1999 NRL season. Darius Boyd (born 17 July 1987) is an Australian professional rugby league footballer and captain of the Brisbane Broncos of the National Rugby League (NRL).  He returned to the club for the 2015 NRL season after having previously played for them between 2006 and 2008, including winning the 2006 NRL Grand Final.  In the intervening years he played for the St. George Illawarra Dragons between 2009 and 2011, also winning the 2010 NRL Grand Final, and the Newcastle Knights during 2012 to 2014, all under a single coach: Wayne Bennett.  An Australian international and Queensland State of Origin representative, he plays at fullback and wing. The 2007 NRL season consisted of 25 weekly regular season rounds, starting from 16 March and ending on 2 September, followed by four weeks of play-offs that culminated in a grand final on 30 September. The 2007 NRL Grand Final was the conclusive, premiership-deciding match of the 2007 NRL season.  It was played between the first-placed Melbourne Storm and second-placed Manly Warringah Sea Eagles at Telstra Stadium on 30 September, in front of 81,392 spectators.  The 2007 Grand final was the fourth to be played between the first and second placed teams, and the first in three years.  The match was the last Grand Final played at night until 2013; each Grand Final in the intervention switched to a 5:00pm AEST kick-off.  This match was also the most-watched television program on Australian TV for 2007. The 2012 NRL season was the 105th season of professional rugby league club competition in Australia, and the first run by the newly formed Australian Rugby League Commission.  The main competition, called the 2012 NRL Telstra Premiership due to sponsorship from Telstra Corporation was contested by the sixteen teams of the National Rugby League.  The season started with the 2012 NRL All Stars match and culminated in the 2012 NRL grand final.  The 2012 Toyota Cup season also took place alongside the Premiership.  The McIntyre Final Eight System, in use since 1999, was replaced with the finals system previously used by the ARL in the 1990s. Telstra Corporation Ltd. (known as Telstra) is an Australian telecommunications and media company which builds and operates telecommunications networks and markets voice, mobile, internet access, pay television and other entertainment products and services.  Telstra is Australia's largest telecommunications company. Lote Daulako Tuqiri (born 23 September 1979) is a Fijian-Australian former professional dual-code rugby footballer who last played for South Sydney Rabbitohs of the NRL.  He represented Australia in both rugby league and rugby union, and Fiji in rugby league.  He usually played as a winger in both codes.  Tuqiri first rose to prominence as a rugby league player for the Brisbane Broncos and Queensland Maroons, as well as the Fiji and Australia national sides.  He was therefore a high-profile signing for rugby union in 2002, winning 67 caps for Australia and being a part of their 2003 and 2007 World Cup squads.  He played rugby union for the Waratahs in the Super 14, and Leicester Tigers in England in season 2009–10.  Tuqiri's contract with the Australian Rugby Union was terminated on 1 July 2009.  No immediate reason was given, and Tuqiri returned to rugby league in 2010, playing for the Wests Tigers of the NRL.  In September 2013, he signed a short-term contract with Irish rugby union giants, Leinster to play in the Pro12 in a three-month deal.  Just 6 weeks out from the 2014 NRL season, Tuqiri signed with his third NRL club, the South Sydney Rabbitohs on a one-year deal. The 2007 Penrith Panthers season was the 41st in the club's history.  They competed in the 2007 NRL season and finished in last place.
Answer: telecommunications company