Question: when did the mayflower set sail from england
[{'answer': 'September 6 , 1620', 'provenance': [{'wikipedia_id': '18622102', 'title': 'Mayflower', 'start_paragraph_id': 23, 'start_character': 482, 'end_paragraph_id': 23, 'end_character': 504, 'bleu_score': 1.0, 'section': 'Section::::Voyage.:"Mayflower" sets sail.\n'}]}, {'provenance': [{'wikipedia_id': '18622102', 'title': 'Mayflower', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 544, 'bleu_score': 0.9117112021532691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5571722000618850515}, 'section': 'Section::::Voyage.:"Mayflower" sets sail.\n'}]}]