Complex sentence: Thérèse Johanne Alexandra Tietjens (July 17,1831, Hamburg--October 3,1877, London) was a leading opera and oratorio soprano of German birth but, according to some sources, Hungarian extraction.
Split into simpler sentences: Thérèse Johanne Alexandra Tietjens (July 17,1831, Hamburg--October 3,1877, London) was a leading opera and oratorio soprano. She was of German birth but, according to some sources, Hungarian extraction.