Question: who played albert ingalls in little house on the prairie
[{'answer': 'Matthew Labyorteaux', 'provenance': [{'wikipedia_id': '2532648', 'title': 'Matthew Labyorteaux', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]