Question: who developed his approach to personality based on the reticular activation system
[{'answer': 'Hans Eysenck', 'provenance': [{'wikipedia_id': '30237309', 'title': "Gray's biopsychological theory of personality", 'start_paragraph_id': 3, 'start_character': 204, 'end_paragraph_id': 3, 'end_character': 216, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '30237309', 'title': "Gray's biopsychological theory of personality", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 993, 'bleu_score': 0.986253478180058, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11594310586776843744}, 'section': 'Section::::History.\n'}]}]