Complex sentence: In 1998, the CDU/CSU-FDP coalition lost the federal election, which ended the FDP's nearly 30 year reign in government coalition.It went back into opposition until 2009, when it became part of a new center-right coalition government.
Split into simpler sentences: In 1998, the CDU/CSU-FDP coalition lost the federal election, which ended the FDP's nearly 30 year reign in government coalition. From 1998 until 2009 the FDP remained in the opposition until it became part of a new center-right coalition government.