Complex sentence: Shimshi was a leading Zionist activist and one of the organizers of the first Zionist Congress in 1897, who, in 1952, was honored by the first Israeli Knesset with the title "Father of the State of Israel".
Split into simpler sentences: Shimshi was a leading Zionist activist and one of the organizers of the first Zionist Congress in 1897. In 1952, he was honored by the first Israeli Knesset with the title "Father of the State of Israel".