Question: who played the principal on saved by the bell
[{'answer': 'Dennis Haskins', 'provenance': [{'wikipedia_id': '1148455', 'title': 'Dennis Haskins', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1148455', 'title': 'Dennis Haskins', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 315, 'bleu_score': 0.8439098817365621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9405258766503554995}, 'section': 'Section::::Abstract.'}]}]