Question: when did eric christian olsen join ncis la
[{'answer': 'in the second season', 'provenance': [{'wikipedia_id': '3316772', 'title': 'Eric Christian Olsen', 'start_paragraph_id': 9, 'start_character': 154, 'end_paragraph_id': 9, 'end_character': 174, 'bleu_score': 1.0, 'section': 'Section::::Career.\n'}]}, {'provenance': [{'wikipedia_id': '3316772', 'title': 'Eric Christian Olsen', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 174, 'bleu_score': 0.80364315327331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5757122452177665601}, 'section': 'Section::::Career.\n'}]}]