Complex sentence: The second party Congress convened from 20-24 July 1947, and adopted a fresh party statute and transformed the party executive committee into a central committee "(Zentralkomitee" or "ZK)".
Split into simpler sentences: The second party Congress convened from 20-24 July 1947. It adopted a fresh party statute and transformed the party executive committee into a central committee "(Zentralkomitee" or "ZK)".