Question: when was the first time romeo saw juliet
[{'answer': 'a Capulet masked ball', 'provenance': [{'wikipedia_id': '99025', 'title': 'Romeo and Juliet (1968 film)', 'start_paragraph_id': 5, 'start_character': 341, 'end_paragraph_id': 5, 'end_character': 362, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '99025', 'title': 'Romeo and Juliet (1968 film)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 638, 'bleu_score': 0.9486604584788991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5311639033034318866}, 'section': 'Section::::Plot.\n'}]}]