Question: who presided over the congress at the signing of the declaration of independence
[{'answer': 'John Hancock', 'provenance': [{'wikipedia_id': '336528', 'title': 'President of the Continental Congress', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Role.\n'}]}]