Complex sentence: He co-chaired the 2003 Resource Development Campaign for the United Way of Southeastern Pennsylvania and was a founding co-chair of Philadelphia 2000, the nonpartisan host committee for the 2000 Republican National Convention.
Split into simpler sentences: He co-chaired the 2003 Resource Development Campaign for the United Way of Southeastern Pennsylvania. He was a founding co-chair of Philadelphia 2000, the nonpartisan host committee for the 2000 Republican National Convention.