Question: Sigrid Arnoldson is believed by critics to have been the successor to what famous opera singer who was often known as the "Swedish Nightingale"?
Sentence (from "Jenny Lind"): One of the most highly regarded singers of the 19th century, she performed in soprano roles in opera in Sweden and across Europe, and undertook an extraordinarily popular concert tour of America beginning in 1850.
Relevant evidence: No