Question: the shortest distance between two points on the earth's surface is
[{'answer': 'great - circle distance', 'provenance': [{'wikipedia_id': '379733', 'title': 'Great-circle distance', 'start_paragraph_id': 5, 'start_character': 53, 'end_paragraph_id': 5, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '379733', 'title': 'Great-circle distance', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 179, 'bleu_score': 0.703429901882201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1392677277421967101}, 'section': 'Section::::Abstract.'}]}]