Question: how many lines are in the poem birches
[{'answer': '59 lines', 'provenance': [{'wikipedia_id': '41042520', 'title': 'Birches (poem)', 'start_paragraph_id': 1, 'start_character': 181, 'end_paragraph_id': 1, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41042520', 'title': 'Birches (poem)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 343, 'bleu_score': 0.9669306597086381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2576446668670854273}, 'section': 'Section::::Abstract.'}]}]