Question: who was the first british pilot to break the sound barrier
[{'answer': 'John Derry', 'provenance': [{'wikipedia_id': '166072', 'title': 'Sound barrier', 'start_paragraph_id': 29, 'start_character': 220, 'end_paragraph_id': 29, 'end_character': 230, 'bleu_score': 1.0, 'section': 'Section::::History.:Breaking the sound barrier.\n'}]}, {'provenance': [{'wikipedia_id': '166072', 'title': 'Sound barrier', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 339, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3522186377923747926}, 'section': 'Section::::History.:Breaking the sound barrier.\n'}]}]