Question: when did the vampire ride open at chessington
[{'answer': 'in 1990', 'provenance': [{'wikipedia_id': '6329788', 'title': 'Vampire (roller coaster)', 'start_paragraph_id': 1, 'start_character': 161, 'end_paragraph_id': 1, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6329788', 'title': 'Vampire (roller coaster)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 637, 'bleu_score': 0.8147289724288941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16257260918041398693}, 'section': 'Section::::Abstract.'}]}]