Question: Preston North End Football Club, an English association football club based in the Deepdale area of Preston, Lancashire, was founded in which year, they were the only team to be known by this nickname for 115 years until Arsenal completed their 2003–04 season without a defeat?

Context paragraphs:
Preston North End F.C. league record by opponent: Preston North End Football Club, an English association football club based in the Deepdale area of Preston, Lancashire, was founded in 1880.  For their first eight years, there was no league football, so matches were arranged on an occasional basis, supplemented by cup competitions organised at both local and national level.  In 1888, Preston participated in the inaugural Football League.  They won the first top-flight league title and of the 22 matches they won 18 and drew the other four, therefore they remained undefeated thus being labelled "The Invincibles".  They were the only team to be known by this nickname for 115 years until Arsenal completed their 2003–04 season without a defeat.  Since then the club has remained in the Football League although it has competed in its various divisions.

Preston North End F.C.: Preston North End Football Club (often shortened to PNE) is a professional association football club located in the Deepdale area of Preston, Lancashire.  They play in the Championship, the second tier of the English football league system.

List of Plymouth Argyle F.C. seasons: Plymouth Argyle Football Club is an English association football club based in Plymouth, Devon.  They compete in Football League Two, the fourth tier of the English football league system, as of the 2012–13 season.  The club was founded in 1886 as "Argyle Football Club".  At this time, there was no League football, so matches were arranged on an ad hoc basis, supplemented by cup competitions.  In January 1903, the club became a limited company and changed their name to "Plymouth Argyle F.C." Election to the Southern League followed in March, as the club gained direct entry to the First Division for the 1903–04 season.  The club were also invited to compete in the Western League, a competition which was considered secondary to the Southern League.

History of Preston North End F.C.: Preston North End Football Club is an English football club in Preston, Lancashire, currently playing in the second tier of English league football, Championship.  They were a founder member of the English Football League in 1888 and were the first English football champions.

Deepdale (disambiguation): Deepdale is the stadium of Preston North End football club, in Preston, England

Deepdale: Deepdale is a football stadium in the Deepdale area of Preston, England, the home of Preston North End F.C.

2003–04 Arsenal F.C. season: The 2003–04 season was the 109th in the history of Arsenal Football Club.  It began on 1 July 2003 and concluded on 30 June 2004, with competitive matches played between August and May.  The club ended the Premier League campaign as champions without a single defeat – a record of 26 wins and 12 draws.  Arsenal fared less well in the cups, eliminated in the FA Cup and League Cup semi-finals to Manchester United and Middlesbrough respectively, and at the quarter-final stage of the UEFA Champions League to Chelsea.

Arsenal F.C. league record by opponent: Arsenal Football Club is an English professional association football club based in Holloway, London.  The club was formed in Woolwich in 1886 as Royal Arsenal before it was renamed Woolwich Arsenal in 1893.  They became the first southern member admitted into the Football League in 1893, having spent their first four seasons solely participating in cup tournaments and friendlies.  The club's name was shortened to Arsenal in 1914, a year after moving to Highbury.  In spite of finishing fifth in the Second Division in 1915, Arsenal rejoined the First Division at the expense of local rivals Tottenham Hotspur when football resumed after the First World War.  Since that time, they have not fallen below the first tier of the English football league system and hold the record for the longest uninterrupted period in the top flight.  The club remained in the Football League until 1992, when its First Division was superseded as English football's top level by the newly formed Premier League, of which they were an inaugural member.  In 2003–04, Arsenal completed a league season without a single defeat, something achieved only once before in English football, by Preston North End in 1888–89.

2003–04 FA Premier League: The 2003–04 FA Premier League (known as the FA Barclaycard Premiership for sponsorship reasons) was the 12th season of the Premier League.  Arsenal were the champions and Chelsea, who had spent heavily throughout the season, were the runners up.  Arsenal ended the season without a single defeat – the first team ever to do so in a 38-game league season and the second team overall (the first was Preston North End in 1889, 115 years earlier, during a 22-game league season).

The Invincibles (football): In English football, "The Invincibles" has been used to refer to the Arsenal team of the 2003–04 season managed by Arsène Wenger, and the Preston North End team of the 1880s managed by William Sudell.  Preston earned the nickname after completing an entire season undefeated in league and cup competition, while Arsenal were undefeated in the league.

Supporting paragraphs: Preston North End F.C. league record by opponent 2003–04 Arsenal F.C. season
Answer: 1880