Complex sentence: In 1978 he moved from Hollywood, California to Jerusalem, Israel and enrolled in D'Var Yerushalayim Yeshiva and met Rabbi Shalom Levine who became his mentor in Halacha and his musical partner in Megama.
Split into simpler sentences: In 1978 he moved from Hollywood, California to Jerusalem, Israel, where he enrolled in D'var Yerushalayim Yeshiva. There he met Rabbi Shalom Levine, who became his mentor in Halacha and his musical partner in Megama.