Question: who plays the caveman in the geico commercials
[{'answer': 'John Lehr', 'provenance': [{'wikipedia_id': '10514668', 'title': 'GEICO Cavemen', 'start_paragraph_id': 2, 'start_character': 111, 'end_paragraph_id': 2, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10514668', 'title': 'GEICO Cavemen', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 629, 'bleu_score': 0.9802931511945101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15231295386141516122}, 'section': 'Section::::Abstract.'}]}]