Question: who discovered the sun is made of hydrogen
[{'answer': 'Cecilia Helena Payne - Gaposchkin', 'provenance': [{'wikipedia_id': '476366', 'title': 'Cecilia Payne-Gaposchkin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]