Question: what was the date of the first wrestlemania
[{'answer': 'March 31 , 1985', 'provenance': [{'wikipedia_id': '896839', 'title': 'WrestleMania I', 'start_paragraph_id': 1, 'start_character': 224, 'end_paragraph_id': 1, 'end_character': 239, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '896839', 'title': 'WrestleMania I', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 531, 'bleu_score': 0.9465931250835241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 400433596534859994}, 'section': 'Section::::Abstract.'}]}]