Question: when was the first looping roller coaster and what was wrong with it
[{'answer': '1848', 'provenance': [{'wikipedia_id': '630245', 'title': 'Roller coaster inversion', 'start_paragraph_id': 1, 'start_character': 191, 'end_paragraph_id': 1, 'end_character': 195, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "intense g - forces ( hereafter `` Gs '' )"}, {'provenance': [{'wikipedia_id': '630245', 'title': 'Roller coaster inversion', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1322, 'bleu_score': 0.9500038060232501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7342860127263276967}, 'section': 'Section::::History.:Prototypes (1848–1903).\n'}]}]