Question: what is the new percy jackson series called
[{'answer': 'The Heroes of Olympus', 'provenance': [{'wikipedia_id': '8093233', 'title': 'Rick Riordan', 'start_paragraph_id': 2, 'start_character': 367, 'end_paragraph_id': 2, 'end_character': 388, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8093233', 'title': 'Rick Riordan', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 918, 'bleu_score': 0.9868845362499331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2482979092016264517}, 'section': 'Section::::Abstract.'}]}]