Question: operant condition is an example of what type of learning
[{'answer': 'instrumental', 'provenance': [{'wikipedia_id': '128027', 'title': 'Operant conditioning', 'start_paragraph_id': 1, 'start_character': 34, 'end_paragraph_id': 1, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '128027', 'title': 'Operant conditioning', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 969, 'bleu_score': 0.9626201417602621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5383096738391481505}, 'section': "Section::::Historical note.:Thorndike's law of effect.\n"}]}]