Question: who sings bj and the bear theme song
[{'answer': 'Greg Evigan', 'provenance': [{'wikipedia_id': '575079', 'title': 'B. J. and the Bear', 'start_paragraph_id': 1, 'start_character': 152, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '575079', 'title': 'B. J. and the Bear', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 105, 'bleu_score': 0.7618274083334161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13057904231589989511}, 'section': 'Section::::Abstract.'}]}]