Question: who wrote the book anne of green gables
[{'answer': 'Lucy Maud Montgomery', 'provenance': [{'wikipedia_id': '58406', 'title': 'Anne of Green Gables', 'start_paragraph_id': 1, 'start_character': 56, 'end_paragraph_id': 1, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '58406', 'title': 'Anne of Green Gables', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 638, 'bleu_score': 0.726632706796543, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16077642896334172214}, 'section': 'Section::::Abstract.'}]}]