Question: during which literary periods did phillis wheatley publish a book of poems
[{'answer': 'American Revolution', 'provenance': [{'wikipedia_id': '38932', 'title': 'Phillis Wheatley', 'start_paragraph_id': 15, 'start_character': 137, 'end_paragraph_id': 15, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Poetry.\n'}]}]