Question: when was mary shelley's frankenstein first published
[{'answer': '1 January 1818', 'provenance': [{'wikipedia_id': '18580673', 'title': 'Frankenstein', 'start_paragraph_id': 1, 'start_character': 370, 'end_paragraph_id': 1, 'end_character': 384, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18580673', 'title': 'Frankenstein', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 467, 'bleu_score': 0.8988217934882791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3911592297957268889}, 'section': 'Section::::Abstract.'}]}]