Question: an enclosed space for producing reverberation of a sound
[{'answer': 'echo chamber', 'provenance': [{'wikipedia_id': '192315', 'title': 'Reverberation', 'start_paragraph_id': 33, 'start_character': 88, 'end_paragraph_id': 33, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Creating reverberation effects.:Chamber reverberators.\n'}]}, {'provenance': [{'wikipedia_id': '192315', 'title': 'Reverberation', 'start_paragraph_id': 33, 'start_character': 0, 'end_paragraph_id': 33, 'end_character': 343, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7517169326403569879}, 'section': 'Section::::Creating reverberation effects.:Chamber reverberators.\n'}]}]