Question: 1897–98 season was the fourth in the history of the Southern League in which a professional association football club, who plays in what league, won the Division One championship?

Context articles: Plymouth Argyle F.C. Player of the Year
List of Queens Park Rangers F.C. players
List of Bristol Rovers F.C. players
Poole Town F.C.
Kings Langley F.C.
1897–98 Southern Football League
Dover Athletic F.C.
List of Watford F.C. players
List of Plymouth Argyle F.C. players
Southampton F.C.

Plymouth Argyle Football Club is an English association football club based in Plymouth, Devon.
 Founded in 1886 as "Argyle Football Club", they became a professional club in January 1903, and were elected to the Southern League ahead of the 1903–04 season.
 The club won the Southern League championship in 1913 and finished as runners-up on two occasions, before being elected to the Football League in 1920, where they compete to this day, as a founder member of the Third Division.
 Argyle won their first Football League championship, and promotion to the Second Division for the first time, ten years later in 1930.
 As of 2010, the club has won five championships in the Football League, gained promotion on eight occasions, and been relegated eight times.
 Four of those league championships were won in the third tier, which is a divisional record.
 Argyle have made one appearance at Wembley Stadium, in which they won the 1996 Third Division play-off final.
 The club has also achieved moderate success in domestic cup competitions; they reached the semi-finals of the FA Cup in 1984, and the quarter-finals in 2007.
 Argyle have also reached the semi-finals of the League Cup twice, in 1965 and 1974.
Queens Park Rangers Football Club, commonly abbreviated to QPR, is an English professional association football club based in White City, London.
 The club was formed in 1888 following a merger between two local teams, St Judes and Christchurch Rangers.
 The new club was named Queens Park Rangers F.C. as most of their players originated from the Queen's Park area of London.
 Following a disagreement with the London Football Association in 1898, the team turned professional in 1899 and joined the Southern League.
 They were one of the teams who moved from the Southern League to become the founding members of the Football League Third Division in 1920, and were also a founder member of the Premier League in 1992.
 Since playing their first competitive match as a professional club, more than 1,100 players have made a competitive first-team appearance for the club, of whom 180 players have made at least 100 appearances (including substitute appearances); those players are listed here.
Bristol Rovers Football Club is an English professional association football club based in Bristol, who play in Football League One, the Third tier of the English football league system, as of the 2016–17 season.
 The club was formed in 1883 under the name Black Arabs F.C. playing their home games at Purdown in Bristol, but they used the name for only a single season, becoming Eastville Rovers and moving to a site known as Three Acres in 1884.
 Eastville Rovers were somewhat nomadic, moving home in 1891 to the Schoolmaster's Cricket Ground, in 1892 to Durdham Down, and in 1894 to Ridgeway, before finally settling at Eastville Stadium and changing their name to Bristol Eastville Rovers in 1897.
 Two years later they adopted their current name of Bristol Rovers when they became founder members of the Southern League.
 They remained at Eastville Stadium for 99 years, before leaving in 1986 when financial pressures meant that they could no longer afford to pay the rent, whereupon they moved to Bath City's Twerton Park, a move that saved the club £30,000 a year.
 After playing for ten years in Bath, the club returned to Bristol in 1997 when they agreed to share Bristol Rugby's Memorial Stadium.
 Since joining The Football League in 1920, when the top division of the Southern League effectively became the Football League Third Division, Rovers have spent most of their time in the second and third tiers of the English football league system; the team has never played in the top flight and spent six years, 2001 to 2007, in the fourth tier.
Poole Town Football Club is a football club based in Poole, Dorset, England.
 They currently compete in the National League South, the sixth tier of English football, after being promoted as champions of the Southern League Premier Division in the 2015–16 season.
 They were established in 1880 and joined the Western League Division Two in 1930.
 The club is affiliated to the Dorset County Football Association and is a FA Charter Standard Community Club.
 They won the Western League title in 1957 and reached the First Round Proper of the FA Cup four times in their history and the Third Round once, losing to Everton at Goodison.
 They play at the Black Gold Stadium, at Tatnam, Poole, and finished the 2008–09 season as "Double" winners – champions and Dorset Senior Cup winners.
 In 2009–10 they became back-to-back champions of the Wessex League and completed an unprecedented treble winning the League for the 3rd time in a row in 2010–11.
 Promotion to the Southern League was finally achieved after an upgrade to the Tatnam facilities.
 Poole were second in their first season, losing to Gosport in a playoff final and then Champions and promoted to the Southern League Premier Division the following season.
 In 2015-2016 they were promoted to the National League South after finishing as champions of the Southern League.
 In the 2016/17 season there were on course to finish in the playoffs after a prolonged stay in the top 7 places.
 After it was announced they could not participate in the playoff games due to not meeting ground grading requirements by 21st March they suffered a dip in form.
 A late resurgence ensured they finished 5th and had to relinquish the playoff place they had subsequently earned.
Kings Langley Football Club are a semi-professional association football club in the village and civil parish of Kings Langley, Hertfordshire, England.
 The club have spent the majority of their history in the Hertfordshire County League, they joined the Spartan South Midlands Football League in 2001, winning the Premier Division in the 2015-16 season and are currently members of the Southern League Premier Division - the seventh tier of the English football league system, following a third consecutive promotion in 2016 when they became champions of the Southern League Division One South.
 In doing so, Kings Langley join Truro F.C., Chester F.C., F.C. United of Manchester and Gretna F.C. as the only clubs in the United Kingdom with three or more successive promotions.
 They are also unofficially the highest-ranked village football club in England.
The 1897–98 season was the fourth in the history of the Southern League.
 Southampton won the Division One championship for the second successive season.
 Bristol City applied for election to Division Two of the Football League.
 However, they were not elected.
Dover Athletic Football Club is an association football club based in the town of Dover, Kent, England.
 The club currently competes in the National League, the fifth tier of English football.
 The club was formed in 1983 after the dissolution of the town's previous club, Dover F.C., whose place in the Southern League was taken by the new club.
 In the 1989–90 season Dover Athletic won the Southern League championship, but failed to gain promotion to the Football Conference as the club's ground did not meet the required standard.
 Three seasons later the team won the title again and this time gained promotion to the Conference, where they spent nine seasons before being relegated at the end of the 2001–02 season.
 The club was transferred from the Southern League to the Isthmian League in 2004, competing in that league's Premier Division for one season before mounting financial problems led the club to a further relegation.
 In the 2007–08 season, Dover won Division One South of the league, before winning the Premier Division in 2008–09 and thus gaining promotion to the Conference South.
 They spent five seasons in this division, reaching the play-offs three times, before defeating Ebbsfleet United in the 2013–14 play-off final to finally return to the Conference Premier after a twelve-year absence.
Watford Football Club is an English association football club based in Watford, Hertfordshire.
 Formed as Watford Rovers in 1881, and renamed West Hertfordshire in 1893, the team joined the Southern League in 1896.
 West Hertfordshire merged with local rivals Watford St. Mary's for the start of the 1898–99 season, adopting the club's present name.
 Between 1898 and 1920, Watford competed in the Southern League, winning the championship in 1914–15.
 The Southern League was suspended for the next four seasons due to the First World War.
 On the league's resumption in 1919–20, Watford finished as runners up on goal average.
 At the start of 1920–21, Watford joined the Football League Third Division, and transferred to the Third Division South when the league was reorganised the following season.
 They have played in the Football League ever since, with the exception of 1939–1946, when competitive football was suspended due to the Second World War, and the 1999–2000 and 2006–07 seasons, when they competed in the Premier League.
 In addition to the latter two seasons, the club also competed in the top division of English football between 1982 and 1988, achieving their highest league placing of second in the 1982–83 season.
Plymouth Argyle Football Club is an English association football club based in Plymouth, Devon.
 Founded in 1886 as "Argyle Football Club", they became a professional club in January 1903, and were elected to the Southern League ahead of the 1903–04 season.
 The club won the Southern League championship in 1913 and finished as runners-up on two occasions, before being elected to the Football League in 1920, where they compete to this day, as a founder member of the Third Division.
 Argyle won their first Football League championship, and promotion to the Second Division for the first time, ten years later in 1930.
 As of May 2011, the club has won five championships in the Football League, gained promotion on eight occasions, and been relegated nine times.
 Four of those league championships were won in the third tier, which is a divisional record.
 Argyle have made one appearance at Wembley Stadium, in which they won the 1996 Third Division play-off final.
 The club has also achieved moderate success in domestic cup competitions; they reached the semi-finals of the FA Cup in 1984, and the quarter-finals in 2007.
 Argyle have also reached the semi-finals of the League Cup twice, in 1965 and 1974.
Southampton Football Club is a professional association football club based in Southampton, Hampshire, England, which plays in the Premier League, the top tier of English football.