Question: who was the guy that painted on pbs
[{'answer': 'Robert Norman Ross', 'provenance': [{'wikipedia_id': '50436882', 'title': 'Bob Ross', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '50436882', 'title': 'Bob Ross', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 535, 'bleu_score': 0.9352166156464101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5378481170463002209}, 'section': 'Section::::Abstract.'}]}]