Complex sentence: He quit his position as Head of the ruling party's foreign affairs committee on 23 May 2010 and he held previous political positions such as the Ambassador of Yemen to Lebanon and Cyprus between the years 2003 and 2007.
Split into simpler sentences: He quit his position as Head of the ruling party's foreign affairs committee on 23 May 2010. He had held previous political positions such as the Ambassador of Yemen to Lebanon and Cyprus between the years 2003 and 2007.