Question: who is credited as the leading contributor to social learning theory
[{'answer': 'B.F. Skinner', 'provenance': [{'wikipedia_id': '330102', 'title': 'Social learning theory', 'start_paragraph_id': 3, 'start_character': 14, 'end_paragraph_id': 3, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::History and theoretical background.\n'}]}, {'provenance': [{'wikipedia_id': '330102', 'title': 'Social learning theory', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 755, 'bleu_score': 0.9391351954647241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 190554332915224983}, 'section': 'Section::::History and theoretical background.\n'}]}]