Question: name the psychologist who greatly contributed to our understanding of observational learning
[{'answer': 'Albert Bandura', 'provenance': [{'wikipedia_id': '52462', 'title': 'Observational learning', 'start_paragraph_id': 3, 'start_character': 314, 'end_paragraph_id': 3, 'end_character': 328, 'bleu_score': 1.0, 'section': 'Section::::Human observational learning.\n'}]}, {'provenance': [{'wikipedia_id': '52462', 'title': 'Observational learning', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 257, 'bleu_score': 0.9466178497997021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2435360415394332474}, 'section': 'Section::::Human observational learning.\n'}]}]