Complex sentence: The group traveled to Marseille, France, by train, and lived in a camp run by Mossad LeAliyah Bet for two months, and in December 1947, boarded an Aliyah Bet ship bound for Palestine.
Split into simpler sentences: The group traveled to Marseille, France, by train, and lived in a camp run by Mossad LeAliyah Bet for two months. In December 1947, he boarded an Aliyah Bet ship bound for Palestine.