Question: when did construction commenced of st peter basilica
[{'answer': 'between 319 and 333 AD', 'provenance': [{'wikipedia_id': '73188', 'title': "St. Peter's Basilica", 'start_paragraph_id': 27, 'start_character': 95, 'end_paragraph_id': 27, 'end_character': 117, 'bleu_score': 1.0, 'section': "Section::::History.:Old St. Peter's Basilica.\n"}]}, {'provenance': [{'wikipedia_id': '73188', 'title': "St. Peter's Basilica", 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 951, 'bleu_score': 0.9371773150089631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11776749947672143828}, 'section': "Section::::History.:Old St. Peter's Basilica.\n"}]}]