Question: who first described the idea of natural rights
[{'answer': 'ancient Greek philosophy', 'provenance': [{'wikipedia_id': '327672', 'title': 'Natural and legal rights', 'start_paragraph_id': 2, 'start_character': 102, 'end_paragraph_id': 2, 'end_character': 126, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '327672', 'title': 'Natural and legal rights', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 743, 'bleu_score': 0.983401048538667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11748818379169662148}, 'section': 'Section::::Abstract.'}]}]