Question: In what year was the team founded that won the 1956-1957 Irish League championship?

full_context: Document 1: Moyola Park F.C.: Moyola Park Association Football Club is an intermediate, Northern Irish football club playing in the NIFL Premier Intermediate League. The club, founded in 1880, hails from Castledawson, near Magherafelt, County Londonderry, and plays its home matches at the Mill Meadow, which has an artificial "3G" surface. Club colours are royal blue and yellow. They are currently managed by Mervyn Pattison. The club won the inaugural Irish Cup in 1881.
Document 2: History of Shamrock Rovers F.C.: Shamrock Rovers Football Club (Irish: "Cumann Peile Ruagairí na Seamróige" ) is a football club from Dublin, Republic of Ireland. Founded in Ringsend, a southside, inner suburb of Dublin, the club's date of foundation is uncertain and disputed. Between 1926 and 1987 the club played at Glenmalure Park, Milltown. Shamrock Rovers F.C. is Ireland's most successful football club having won the League of Ireland a record 17 times, including four times in a row in the 1980s, along with the FAI Cup a record 24 times, including six times in a row in the 1960s. It was also the first Irish club to participate in a European competition, playing in the European Cup in 1957. Shamrock Rovers was also one of the European club teams that spent the 1967 season in the United States to found the United Soccer Association, representing Boston as the Boston Rovers.
Document 3: 1956–57 Iraq FA Cup Championship: The 1956–57 Iraq FA Cup Championship was the 2nd season of what is now known as the League of the Institutes (the top division of Iraqi football from 1948 to 1974), and it was the first national championship to be held since the 1948–49 season. Unlike that season, this time it was open to teams from Baghdad only.
Document 4: 2017 Antrim Senior Football Championship: The 2017 Antrim Senior Football Championship is the 116th official edition of Antrim GAA's premier club gaelic football tournament for senior clubs in County Antrim. The tournament consists of 13 teams with the winner representing Antrim in the Ulster Senior Club Football Championship. The championship has a straight knock-out format.
Document 5: Glentoran F.C.: Glentoran Football Club is a semi-professional football club that plays in the NIFL Premiership. The club was founded in 1882 and plays its home games at the Oval in east Belfast. Club colours are red, green and black. Linfield and Glentoran are nicknamed Belfast's "Big Two", as they have traditionally dominated local football in Northern Ireland since the demise of Belfast Celtic. The two play a league match on Boxing Day each year, which regularly attracts the largest attendance of the Irish League season.
Document 6: Billy Neill: Billy Neill was a footballer who played in the Irish League with Glentoran from 1950-1963. With the Glens, he won the Irish League championship in 1952/53, the Gold Cup twice, the City Cup and the Ulster Cup once each. He was capped fourteen times by the Irish League between 1952 and 1959. He was the Ulster Footballer of the Year for the 1959/60 season.
Document 7: Maurice McVeigh: Maurice McVeigh was a footballer from Northern Ireland who played with Glenavon from 1948. Nicknamed "Twinkle Toes", he was a member of Glenavon's first-ever Irish League championship teams. A shipyard worker from Belfast, he won eleven amateur international caps for Northern Ireland and three inter-league caps for the Irish League. He was the Ulster Footballer of the Year for the 1954/55 season.
Document 8: Derry City F.C.: The club, founded in 1928, initially played in the Irish League, the domestic league in Northern Ireland, and won a title in 1964–65. In 1971, security concerns related to the Troubles meant matches could not be played at the Brandywell. The team played home fixtures 30 mi away in Coleraine. The security forces withdrew their objections to the use of the Brandywell the following year, but in the face of insistence from the Irish League that the unsustainable arrangement continue, the club withdrew from the league. After 13 years in junior football, it joined the League of Ireland's new First Division for 1985–86. Derry won the First Division title and achieved promotion to the Premier Division in 1987, and remained there until the 2009 relegation. The club won a domestic treble in 1988–89, the only League of Ireland club so far.
Document 9: Linfield F.C.: Linfield Football Club is a semi-professional football club based in Belfast, Northern Ireland. The club was founded in 1886 as Linfield Athletic Club and in 1905 moved into the current home of Windsor Park, which is also the home of the Northern Ireland national team. The club plays in the NIFL Premiership – the highest level of the Northern Ireland Football League. Linfield's main rival is Glentoran – the other half of Belfast's Big Two. This rivalry traditionally includes a league derby played on Boxing Day each year, which usually attracts the largest league attendance of the season. Linfield's average league home attendance is approximately 2,500 the highest in the division and more than double the league's overall average of about 1,000.
Document 10: NIFL Charity Shield: The Northern Ireland Football League Charity Shield is the national association football super cup in Northern Ireland. It has been held on an occasional basis since its inauguration in 1992. Similar to the English FA Community Shield, it pits together the previous campaign's Irish League champions and Irish Cup winners, providing the opening match of the Irish League season. The 2014 edition, the first since 2000, saw 2013–14 NIFL Premiership champions Cliftonville face 2013–14 Irish Cup runners-up Ballymena United. Cup winners Glenavon were unable to take part due to a pre-arranged fixture. Cliftonville defeated Ballymena United 4–2 on penalties following a 0–0 draw after 90 minutes, lifting the Shield for the second time.
Document 11: Crusaders F.C.: Crusaders Football Club is a Northern Irish semi-professional football club, playing in the NIFL Premiership. The club, founded in 1898, hails from Belfast and plays its home matches at Seaview. Club colours are red and black. The current manager is former player Stephen Baxter, who is the club's longest serving manager, having been appointed in 2005. Crusaders played intermediate football until 1949, and during that time they were one of the top non-league teams in the country. The withdrawal of Belfast Celtic from the senior ranks in 1949 resulted in Crusaders being elected in their place in time for the start of the 1949–50 season.
Document 12: Coleraine F.C.: Coleraine Football Club is a Northern Irish semi-professional football club, playing in the NIFL Premiership. The club, founded in 1927, hails from Coleraine, County Londonderry and plays its home matches at The Showgrounds. Club colours are blue and white. The current manager is Oran Kearney.The Bannsiders won the Irish League title once (in 1973–74) and the Irish Cup on five occasions, most recently in 2002–03. They are also the only Irish League club to have won two successive all-Ireland competitions, lifting the Blaxnit Cup in 1969 and 1970.The club is bitter rivals with Ballymena United with their matches being known as the "North West Derby"
Document 13: Ballymena United F.C.: Ballymena United Football Club is a semi-professional football club from Northern Ireland. Based in Ballymena, County Antrim, the team competes in the NIFL Premiership and plays home matches at the Ballymena Showgrounds.The club is managed by iconic Irish League player/manager David Jeffrey.
Document 14: Glenavon F.C.: Glenavon Football Club is a semi-professional, Northern Irish football club playing in the NIFL Premiership. The club, founded in 1889, hails from Lurgan and plays its home matches at Mourneview Park. Club colours are blue and white. Gary Hamilton has been player-manager of the Lurgan Blues since December 2011 following the resignation of Marty Quinn.
Document 15: 1956–57 Irish League: The Irish League in season 1956–57 comprised 12 teams, and Glenavon won the championship.
ground_truth: 1889