Complex sentence: Carmi's previous experience working with survivors made him an important asset for the Berihah movement and Carmi returned to Italy in 1946 and attended the 22nd Zionist Congress in Basel where he gained insight into how the Berihah operated throughout Europe.
Split into simpler sentences: Carmi's previous experience working with survivors made him an important asset for the Berihah movement. He returned to Italy in 1946 and attended the 22nd Zionist Congress in Basel, where he gained insight into how the Berihah operated throughout Europe.