Question: who proposed the extreme form of behaviorism known as radical behaviorism
[{'answer': 'B.F. Skinner', 'provenance': [{'wikipedia_id': '263623', 'title': 'Radical behaviorism', 'start_paragraph_id': 48, 'start_character': 86, 'end_paragraph_id': 48, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Further reading.\n'}]}, {'provenance': [{'wikipedia_id': '263623', 'title': 'Radical behaviorism', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 578, 'bleu_score': 0.869289701253497, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5287568285752674249}, 'section': 'Section::::Abstract.'}]}]