Complex sentence: Bill Clinton, 42nd President of the United States, was impeached by the House of Representatives on charges of perjury and obstruction of justice on December 19,1998, but acquitted by the Senate on February 12,1999.
Split into simpler sentences: Bill Clinton, 42nd President of the United States, was impeached by the House of Representatives on two charges, one of perjury and one of obstruction of justice, on December 19,1998. Clinton was acquitted by the Senate on February 12,1999.