Question: who provided the voice of the gecko in its debut
[{'answer': 'Kelsey Grammer', 'provenance': [{'wikipedia_id': '21396796', 'title': 'GEICO advertising campaigns', 'start_paragraph_id': 8, 'start_character': 438, 'end_paragraph_id': 8, 'end_character': 452, 'bleu_score': 1.0, 'section': 'Section::::The GEICO Gecko.\n'}]}, {'provenance': [{'wikipedia_id': '21396796', 'title': 'GEICO advertising campaigns', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 1071, 'bleu_score': 0.6120333743242381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18099425266946025822}, 'section': 'Section::::The GEICO Gecko.\n'}]}]