Complex sentence: The events surrounding the formation of Spain's government in 2016 have taken place from 21 December 2015 to the present day, following the December 2015 general election, which failed to produce an overall majority for any of the country's main political parties.
Split into simpler sentences: The events surrounding the formation of Spain's government in 2016 have taken place from 21 December 2015 to the present day. The December 2015 general election failed to produce an overall majority for any of the country's main political parties.