Question: Around what year was the political party of which Barbara Boggs Sigmund was a member founded?

Context paragraphs:
Unity Party (South Ossetia): The Unity Party (Ossetian: Иудзинад , Georgian: ერთიანობის , Russian: Единство ; officially, the South Ossetian Republican Political Party "Unity") is a major political party with a socially conservative ideology in South Ossetia, a partially recognized Caucasian republic, considered by most countries to be a part of Georgia.  The Unity Party, founded in 2003, supported former President Eduard Kokoity, and was for a decade the largest political party in South Ossetia.  After the 2009 elections, the party held 17 out of 34 seats in South Ossetia's parliament.  It is modeled after and is closely linked to the United Russia party, with which it has signed an inter-party cooperation agreement.  The party is a winner of the 2004 and 2009 parliamentary elections.

Save Romania Union: The Save Romania Union (Romanian: "Uniunea Salvați România" , USR) is a political party in Romania.  The party was founded following the success of the Save Bucharest Union (USB) party in the 2016 local elections.  After being officially registered as a political party in 2016, it united with the USB and Union for Codlea parties, thus gaining most of its initial membership base from the two latter parties.  It is currently the third largest political party in Romania after the 2016 legislative elections and the only outspoken pro-LGBT party in the country.

National Bolshevik Party: The National Bolshevik Party (NBP, Russian: Национал-большевистская партия, НБП , also known as the Nazbols, Russian: Нацболы ) operated from 1994 to 2007 as a Russian political party with a political program of National Bolshevism.  The NBP became a prominent member of The Other Russia coalition of opposition parties.  Russian courts banned the organization: it never officially registered as a political party.  In 2010, its leader, Eduard Limonov, founded a new political party, The Other Russia.  There have been smaller NBP groups in other countries.

Federation Party: The Federation Party was Fiji's first formal political party.  The Citizens Federation, which had won three of the four seats reserved for Indo-Fijians at the 1963 elections, decided to formalize its role as a political party, which was officially founded on 21 June 1964 with A. D. Patel as President and Sidiq Koya as Vice-President.  The merger took place in time for the party to participate in the 1965 constitutional conference which was called to map out a path towards independence from the United Kingdom.  In 1968, the Federation Party merged with the National Democratic Party to form the National Federation Party, which is now (2015) the oldest political party in Fiji still in existence.

Barbara Boggs Sigmund: Barbara Boggs Sigmund (May 27, 1939 – October 10, 1990) was a daughter of the powerful Democratic United States Representative Hale Boggs of Louisiana, and Lindy Boggs, who became a Congresswoman from Louisiana after her husband Hale died in an air crash.

Aboriginal Peoples Party of Canada: The Aboriginal Peoples Party of Canada (APP) is a Canadian political party that was founded in 2005.  The party was conceived by University of Lethbridge student Myron Wolf Child.  It held its founding meeting on August 21, 2005, in St. Albert, Alberta.  The APP was headed by interim leader Bill Montour, a former Chief of the Six Nations Reserve in Ontario.  In October 2005, the party had 122 confirmed members, just less than half the number needed to register as an official party in Canada.  In late October 2005, the APP sought to unite with the First Peoples National Party of Canada which also had fewer than the number of confirmed members needed to become a registered political party.  The First Peoples National Party of Canada became an eligible political party on December 6, 2005.  Whether or not this was accomplished through a merger with the APP is unclear.  If this is the case, the APP no longer exists, but, as one of the stipulations of a possible merger was that a name for the new party would be determined at the party's first convention, it is possible that the name Aboriginal Peoples Party of Canada will come into usage again.

National Development Party (Brunei): The National Development Party ("Parti Pembanguan") is a political party in Brunei.  Although legally registered as a political party in Brunei, it has not been able to gain electoral representation as legislative elections have not been held in Brunei since 1962.  The party was founded on 12 September 2005 by former rebel and Secretary General of the banned Brunei People's Party, Yassin Affandi, aka Haji Muhammad Yasin bin Abdul Rahman, co-founded the Party, which is the third political party that is operating legally in Brunei to date.

Green Wind: Green Wind was a left-wing political party in Japan.  It opposed the Trans-Pacific Partnership and October 2012 Consumption Tax Hike.  It was founded as a parliamentary group in July 2012, and as a political party in November 2012 when Representative Makoto Yamazaki left the Democratic Party and joined the group.  On November 17, 2012, the party obtained its second member of the lower house, the House of Representatives, when former Democratic Party Representative Eriko Fukuda joined the party.  In 2013, Tomoko Abe, the last remaining member of Tomorrow Party of Japan, joined Green Wind.  However, on December 31, 2013, the party was dissolved.

Democratic Party (United States): The Democratic Party is one of the two major contemporary political parties in the United States, along with the Republican Party.  Tracing its heritage back to Thomas Jefferson and James Madison's Democratic-Republican Party, the modern-day Democratic Party was founded around 1828 by supporters of Andrew Jackson, making it the world's oldest political party.

Boerestaat Party: The Boerstaat Party (English: "Boer State Party" ) is a right wing South African political party founded on 30 September 1986 by the late Robert van Tonder.  It was never officially registered as a political party because it was unable to rally 500 persons under one roof, a requirement under South African electoral law for official political party status.  It was never represented in the South African Parliament, neither in the apartheid era nor after democratisation.  In 1989, it joined the Afrikaner Weerstandsbeweging (AWB) in declaring support for Jaap Marais, the leader of the Herstigte Nasionale Party and has worked with the HNP on occasion since.  The party was a charter member of the Afrikaner Volksfront coalition group.  It has also operated with the paramilitary group, the "Boere Weerstandsbeweging" (Boer Resistance Movement) led by Andrew Ford.

Supporting paragraphs: Barbara Boggs Sigmund Democratic Party (United States)
Answer: 1828