Question: how many heat tiles on a space shuttle
[{'answer': 'about 24,300 unique tiles', 'provenance': [{'wikipedia_id': '2230989', 'title': 'Space Shuttle thermal protection system', 'start_paragraph_id': 25, 'start_character': 11, 'end_paragraph_id': 25, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::Detailed description.\n'}]}, {'provenance': [{'wikipedia_id': '2230989', 'title': 'Space Shuttle thermal protection system', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 457, 'bleu_score': 0.53240447284627, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6701563476477892466}, 'section': 'Section::::Detailed description.\n'}]}]