Complex sentence: In 1998 election, he ran for and became the representative of lone district of Valenzuela municipality, then he won his re-election as representative of the second district of the newly chartered Valenzuela City in 2001.
Split into simpler sentences: In 1998 election, he ran for and became the representative of lone district of Valenzuela municipality. Then he won his re-election as representative of the second district of the newly chartered Valenzuela City in 2001.