Complex sentence: In 1947 he suceeded his father and became the Modzitzer Rebbe to be known as the "Imre Aish" ("Words of Fire") as Samuel Eliyahu is called, and continued the traditions of Modzitz both as a composer and Torah scholar.
Split into simpler sentences: In 1947 he suceeded his father and became the Modzitzer Rebbe. The Imre Aish as Reb Samuel Eliyahu is called continued the tradition of Modzitz both as a composer and Torah scholar.