Question: who discovered that light travels faster than sound
[{'answer': 'Abū Rayhān al - Bīrūnī', 'provenance': [{'wikipedia_id': '28736', 'title': 'Speed of light', 'start_paragraph_id': 86, 'start_character': 643, 'end_paragraph_id': 86, 'end_character': 670, 'bleu_score': 1.0, 'section': 'Section::::History.:Early history.\n'}]}, {'provenance': [{'wikipedia_id': '28736', 'title': 'Speed of light', 'start_paragraph_id': 86, 'start_character': 0, 'end_paragraph_id': 86, 'end_character': 777, 'bleu_score': 0.985238839858627, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2986732602377226948}, 'section': 'Section::::History.:Early history.\n'}]}]