Question: where did the st valentine's massacre happen
[{'answer': 'February 14 , 1929', 'provenance': [{'wikipedia_id': '42097', 'title': "Saint Valentine's Day Massacre", 'start_paragraph_id': 7, 'start_character': 81, 'end_paragraph_id': 7, 'end_character': 101, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]