Question: what is ducky's first name on ncis
[{'answer': 'Donald', 'provenance': [{'wikipedia_id': '11510033', 'title': 'List of NCIS characters', 'start_paragraph_id': 1, 'start_character': 252, 'end_paragraph_id': 1, 'end_character': 258, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]