You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

In 1582 the united provinces invited francis, duke of anjou to lead them; but after a failed attempt to take antwerp in 1583, the duke left the netherlands again. after the assassination of william of orange (10 july 1584), both henry iii of france and elizabeth i of england declined the offer of sovereignty. however, the latter agreed to turn the united provinces into a protectorate of england (treaty of nonsuch, 1585), and sent the earl of leicester as governor-general. this was unsuccessful and in 1588 the provinces became a confederacy. the union of utrecht is regarded as the foundation of the republic of the seven united provinces, which was not recognized by the spanish empire until the peace of westphalia in 1648.
Solution: In what year did francis, duke of anjou leave the netherlands?
Why? The generated question is perfect. Because the question is based on second sentence of the input passage and its answer is 1583.

New input: Republican Coalition Party (in Estonian: Vabariiklaste Koonderakond) 22.09.1990 -- 21.11.1992 Leo Starkov Estonian Christian-Democratic Union (Eesti Kristlik-Demokraatlik Liit) 29.08.1989 -- 21.11.1992 Illar Hallaste Estonian Christian-Democratic Party (Eesti Kristlik-Demokraatlik Erakond) 23.07.1988 -- 21.11.1992 Aivar Kala Estonian Conservative People's Party (Eesti Konservatiivne Rahvaerakond) 09.06.1990 -- 21.11.1992 Enn Tarto Estonian National Independence Party (Eesti Rahvusliku Soltumatuse Partei) 20.08.1988 -- 18.07.1993 Lagle Parek 18.07.1993 -- 27.11.1993 Ants Erm 27.11.1993 -- 02.12.1995 Tunne-Valdo Kelam Estonian National Coalition Party 'Pro Patria' (Eesti Rahvuslik Koonderakond Isamaa) 21.11.1992 -- 02.12.1995 Mart Laar Estonian Pro Patria Union (Eesti Isamaaliit) 02.12.1995 -- 24.10.1998 Toivo Jurgenson 24.10.1998 -- 14.12.2002 Mart Laar 14.12.2002 -- 16.04.2005 Tunne-Valdo Kelam 16.04.2005 -- 04.06.2006 Tonis Lukas Res Publica Party (Erakond Res Publica) 08.12.2001 -- 24.08.2002 Rein Taagepera 24.08.2002 -- 04.06.2005 Juhan Parts 04.06.2005 -- 04.06.2006 Taavi Veskimagi Pro Patria and Res Publica Union (Isamaa ja Res Publica Liit) 04.06.2006 -- 26.05.2007 Taavi Veskimagi (Res Publica) / Tonis Lukas (Pro Patria) 26.05.2007 -- 28.01.2012 Mart Laar 28.01.2012 -- 06.06.2015 Urmas Reinsalu 06.06.2015 --
Solution:
Who led Pro Patria and Res Publica Union?