Question: in what form was charles dickens first book published
[{'answer': 'Monthly serial', 'provenance': [{'wikipedia_id': '5884', 'title': 'Charles Dickens', 'start_paragraph_id': 102, 'start_character': 81, 'end_paragraph_id': 102, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Notable works.\n'}]}, {'provenance': [{'wikipedia_id': '5884', 'title': 'Charles Dickens', 'start_paragraph_id': 102, 'start_character': 0, 'end_paragraph_id': 102, 'end_character': 124, 'bleu_score': 0.6179396438001991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15697745071880380012}, 'section': 'Section::::Notable works.\n'}]}]