Question: what is the first book of the mortal instruments series
[{'answer': 'City of Bones', 'provenance': [{'wikipedia_id': '22761800', 'title': 'The Mortal Instruments', 'start_paragraph_id': 2, 'start_character': 208, 'end_paragraph_id': 2, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]