Question: What year saw the formation of the coalition that won 26 seats in the 1999 Indian general election?

Context paragraphs:
Indian general election, 2004 (Gujarat): In the Indian general election, 2004 for Gujarat polls were held for 26 seats in the state.  The result was a victory for the Bharatiya Janata Party (BJP) which won 14 seats.  The remaining 12 seats were won by Indian National Congress (INC).

Indian general election, 1996 (Tamil Nadu): The Indian general election, 1996 polls in Tamil Nadu were held for 39 seats in the state.  The result was a landslide for the newly formed alliance between Dravida Munnetra Kazhagam (DMK), Tamil Maanila Congress (TMC) and its leader G.K. Moopanar, and the left parties who ended up getting all 39 seats.  Post election, the newly formed United Front, ended up getting all the seats from Tamil Nadu, since DMK and TMC joined it, with outside support from Indian National Congress (INC).  The results in Tamil Nadu is a reflection of the results nationally, where INC, ended up losing the most seats.  This election was seen as redemption for Moopanar and TMC, since they left Congress, on grounds that they formed an alliance with ADMK, even though J. Jayalalithaa, leader of ADMK, was accused of many corruption charges.  This led to a disastrous showing, for ADMK and Congress in Tamil Nadu, since they lost all 39 seats from the last election, and TMC reaping the benefits by getting the most seats, in this election with 20 seats.

2010–11 Belgian government formation: Following the Belgian general election held on 13 June 2010, a process of cabinet formation started in Belgium.  The election produced a very fragmented political landscape, with 11 parties elected to the Chamber of Representatives, none of which won more than 20% of the seats.  The separatist New Flemish Alliance (N-VA), the largest party in Flanders and the country as a whole, controlled 27 of 150 seats in the lower chamber.  The Francophone Socialist Party (PS), the largest in Wallonia, controlled 26 seats.  Cabinet negotiations continued for a long time.  On 1 June 2011, Belgium matched the record for time taken to form a new democratic government after an election, at 353 days, held until then by Cambodia in 2003–2004.  On 11 October 2011, the final agreement for institutional reform was presented to the media.  A government coalition was named on 5 December 2011 and sworn in after a total of 541 days of negotiations and formation on 6 December 2011, and 589 days without an elected government with Elio Di Rupo named Prime Minister of the Di Rupo I Government.

Indian general election, 2014 (Gujarat): In the Indian general election, 2014 for Gujarat were held for 26 seats in the state.The major two contenders in the state were Bharatiya Janta Party (BJP) and the Indian National Congress (INC).  BJP won all 26 seats.

National Democratic Alliance (India): The National Democratic Alliance (NDA) is a centre-right coalition of political parties in India.  At the time of its formation in 1998, it was led by the Bharatiya Janata Party (BJP) and had thirteen constituent parties.  Its honorary chairman is former Prime Minister Atal Bihari Vajpayee.  Also representing the alliance are L. K. Advani, former Deputy Prime Minister, who is the acting chairman of the Alliance, Narendra Modi, current Prime Minister and Leader of the House in Lok Sabha; and Arun Jaitley, Leader of the House in Rajya Sabha.  The coalition was in power from 1998 to 2004.  The alliance returned to power in the 2014 General election with a combined vote share of 38.5%.  Its leader, Narendra Modi, was sworn in as Prime Minister of India on 26 May 2014.

Sikkim Legislative Assembly election, 2009: The Sikkim Legislative Assembly election of 2009 took place in April 2009, concurrently with the Indian general election, 2009.  The elections were held in the state for all 32 legislative assembly seats along with third phase of Indian general elections, 2009 on 30 April 2009.  The results were declared 5 May 2009.  The Sikkim Democratic Front (SDF) further strengthened their majority in the Sikkim Assembly by winning all the seats.  Incumbent Chief Minister Pawan Kumar Chamling's Government returned for an unprecedented fourth consecutive term having won previous elections in 1994, 1999 and 2004.

Indian general election, 2009 (Gujarat): In the Indian general election, 2009 for Gujarat were held for 26 seats in the state.The major two contenders in the state were Bharatiya Janta Party (BJP) and the Indian National Congress (INC).

Indian general election, 1999 (Tamil Nadu): The Indian general election, 1999 polls in Tamil Nadu were held for 39 seats in the state.  The result was a victory for the National Democratic Alliance (NDA) which won 26 seats.  After leaving the NDA, All India Anna Dravida Munnetra Kazhagam, hoped to create some damage, but ended up losing 8 seats, compared to the 1998 Lok Sabha elections.  This is also the first time that Dravida Munnetra Kazhagam, allied with the Bharatiya Janata Party, helping them have power at the national level for the next 5 years with the NDA, before they joined the UPA.  The NDA, ended up losing 3 seats, compared to the election the year before, due to ADMK leaving the NDA, but the seats were made up, because DMK left the united front and joined the NDA.

Indian general election, 1957 (Madras): The Indian general election, 1957 polls in Tamil Nadu were held for 34 seats in the state.  The result was a victory for Indian National Congress winning 24 out of 34 seats.  The major opposition for INC, the CPI, managed to only win 2 seats.  This election also saw the entry of Dravida Munnetra Kazhagam in their first national election, who ended up winning 2 seats.  Due to the nonrecognition of state parties such as the DMK, they were grouped under independent parties, which won a total of 8 seats.

Indian general election, 2014: The Indian general election of 2014 was held to constitute the 16th Lok Sabha, electing members of parliament for all 543 parliamentary constituencies of India.  Running in nine phases from 7 April to 12 May 2014, it was the longest election in the country's history.  According to the Election Commission of India, 814.5 million people were eligible to vote, with an increase of 100 million voters since the last general election in 2009, making it the largest-ever election in the world.  Around 23.1 million or 2.7% of the total eligible voters were aged 18–19 years.  A total of 8,251 candidates contested for the 543 Lok Sabha seats.  The average election turnout over all nine phases was around 66.38%, the highest ever in the history of Indian general elections.

Supporting paragraphs: Indian general election, 1999 (Tamil Nadu) National Democratic Alliance (India)
Answer: 1998