Question: when did raging waters san dimas first open
[{'answer': 'June 18 , 1983', 'provenance': [{'wikipedia_id': '489780', 'title': 'Raging Waters', 'start_paragraph_id': 8, 'start_character': 21, 'end_paragraph_id': 8, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Raging Waters Los Angeles.\n'}]}, {'provenance': [{'wikipedia_id': '489780', 'title': 'Raging Waters', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 215, 'bleu_score': 0.894648108888298, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7129786004857681726}, 'section': 'Section::::Raging Waters Los Angeles.\n'}]}]