Question: name the temporary chairman of the constituent assembly for drafting the constitution of india
[{'answer': 'Sachchidananda Sinha', 'provenance': [{'wikipedia_id': '1589530', 'title': 'Constituent Assembly of India', 'start_paragraph_id': 15, 'start_character': 4, 'end_paragraph_id': 15, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Organization.\n'}]}]