Question: who does the voice for isaac on the orville
[{'answer': 'Mark Jackson', 'provenance': [{'wikipedia_id': '51358237', 'title': 'The Orville', 'start_paragraph_id': 23, 'start_character': 558, 'end_paragraph_id': 23, 'end_character': 570, 'bleu_score': 1.0, 'section': 'Section::::Production.:Casting.\n'}]}, {'provenance': [{'wikipedia_id': '51358237', 'title': 'The Orville', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 828, 'bleu_score': 0.658853214130772, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11823088071608667506}, 'section': 'Section::::Cast and characters.:Main.\n'}]}]