Complex sentence: For example the "1900s" century began on January 1 1900 and ended on December 31 1999 and the 2000s century began on January 1 2000 and will end on December 31 2099.
Split into simpler sentences: For example the "1900s" century began on January 1 1900 and ended on December 31 1999. The 2000s century began on January 1 2000 and will end on December 31 2099.