Question: What Czech operatic contralto had a close partnership with the composer of "The Bartered Bride"?
Related documents: [0]  [DOC] Betty Fibichová (16 March 1846 – 20 May 1901) was a Czechoslovak opera singer and the wife of composer Zdeněk Fibich. The greatest Czech operatic contralto of her day, she enjoyed close artistic partnerships with both Antonín Dvořák and Bedřich Smetana in addition to collaborating frequently with her husband. [END] 
[1]  [DOC] Bedřich Smetana (] ; 2 March 1824 – 12 May 1884) was a Czech composer who pioneered the development of a musical style which became closely identified with his country's aspirations to independent statehood. He is thus widely regarded in his homeland as the father of Czech music. Internationally he is best known for his opera "The Bartered Bride" and for the symphonic cycle "Má vlast" ("My Homeland"), which portrays the history, legends and landscape of the composer's native land. [END] 
Answer: 
Betty Fibichová
Betty Fibichová