Question: who came up with the idea of survival of the fittest
[{'answer': 'Charles Darwin', 'provenance': [{'wikipedia_id': '627964', 'title': 'Survival of the fittest', 'start_paragraph_id': 2, 'start_character': 53, 'end_paragraph_id': 2, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '627964', 'title': 'Survival of the fittest', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 435, 'bleu_score': 0.972407137066537, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 361535899741371076}, 'section': 'Section::::Abstract.'}]}]