Question: who conducted the opening concert at carnegie hall
[{'answer': 'Walter Damrosch'}, {'answer': 'Pyotr Ilyich Tchaikovsky'}, {'answer': 'maestro Walter Damrosch'}, {'answer': 'maestro Walter Damrosch and great Russian composer Pyotr Ilyich Tchaikovsky'}, {}, {'provenance': [{'wikipedia_id': '169321', 'title': 'Carnegie Hall', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5246464670873319404}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23170252', 'title': 'The General Electric Concert', 'section': 'Section::::Abstract.', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ["Walter Damrosch, a pioneer in the presentation of music on radio, conducted the orchestra for General Electric in the late 1920s and early 1930s on a program that was listed in newspapers as Damrosch's General Electric Concert.", 'ponsored radio programs on WGY in Schenectady, New York. Walter Damrosch, a pioneer in the presentation of music on radio, conducted the orchestra for General Electric in the late 1920s and early 1930s on a program that was listed in newspapers as', "The General Electric Concert was a music series sponsored by General Electric and broadcast on the NBC Red Network beginning in 1931. Featuring orchestral selections along with tenor Richard Crooks, the 30-minute program aired Sunday afternoon at 5:30pm in 1931-32. It moved to Sunday evenings at 9pm for the 1932-33 season. As early as 1923, General Electric sponsored radio programs on WGY in Schenectady, New York. Walter Damrosch, a pioneer in the presentation of music on radio, conducted the orchestra for General Electric in the late 1920s and early 1930s on a program that was listed in newspapers as Damrosch's General Electric Concert."]}}]}]