Question: when did jack mccoy started on law and order
[{'answer': '1994', 'provenance': [{'wikipedia_id': '1865101', 'title': 'Jack McCoy', 'start_paragraph_id': 1, 'start_character': 157, 'end_paragraph_id': 1, 'end_character': 161, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1865101', 'title': 'Jack McCoy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 474, 'bleu_score': 0.770284754836136, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15676548650813359127}, 'section': 'Section::::Abstract.'}]}]