Question: who came up with the principle of double effect
[{'answer': 'Thomas Aquinas', 'provenance': [{'wikipedia_id': '248256', 'title': 'Principle of double effect', 'start_paragraph_id': 1, 'start_character': 578, 'end_paragraph_id': 1, 'end_character': 592, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '248256', 'title': 'Principle of double effect', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 660, 'bleu_score': 0.9666465443060471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14004805223207342212}, 'section': 'Section::::Abstract.'}]}]