Question: who is left from the original cast of ncis
[{'answer': 'Mark Harmon', 'provenance': [{'wikipedia_id': '39272208', 'title': 'List of NCIS cast members', 'start_paragraph_id': 7, 'start_character': 12, 'end_paragraph_id': 7, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Crossovers.:"JAG".\n'}]}, {'answer': 'Michael Weatherly', 'provenance': [{'wikipedia_id': '39272208', 'title': 'List of NCIS cast members', 'start_paragraph_id': 7, 'start_character': 25, 'end_paragraph_id': 7, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Crossovers.:"JAG".\n'}]}, {'answer': 'Pauley Perrette', 'provenance': [{'wikipedia_id': '39272208', 'title': 'List of NCIS cast members', 'start_paragraph_id': 7, 'start_character': 64, 'end_paragraph_id': 7, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Crossovers.:"JAG".\n'}]}, {'answer': 'David McCallum', 'provenance': [{'wikipedia_id': '39272208', 'title': 'List of NCIS cast members', 'start_paragraph_id': 7, 'start_character': 44, 'end_paragraph_id': 7, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Crossovers.:"JAG".\n'}]}, {'answer': 'Sean Murray'}]