Complex sentence: Sofer, Chief Rabbi of the Orthodox community in Pressburg was a pupil of Rabbi Nathan Adler of Frankfurt who was a master of Kabbalah as well as a pupil of Rabbi Pinchas HaLevi Horowitz of Frankfurt, a renowned Talmudist.
Split into simpler sentences: Sofer, Chief Rabbi of the Orthodox community in Pressburg, was a pupil of Rabbi Nathan Adler of Frankfurt, who was a master of Kabbalah. He was also a pupil of Rabbi Pinchas HaLevi Horowitz of Frankfurt, a renowned Talmudist.