Complex sentence: From 1997 to 2001, he was the Senator of the fourth term and the chairperson in the Office for International Affairs and European Integration; as a Senior Speaker he chaired the inaugural session of the Senate of the Republic of Poland.
Split into simpler sentences: From 1997 to 2001, he was the Senator of the fourth term and the chairperson in the Office for International Affairs and European Integration. As a Senior Speaker he chaired the inaugural session of the Senate of the Republic of Poland.