Question: where was the salvation army christmas collection kettle first introduced
[{'answer': 'San Francisco', 'provenance': [{'wikipedia_id': '8511440', 'title': 'Christmas Kettle', 'start_paragraph_id': 3, 'start_character': 48, 'end_paragraph_id': 3, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '8511440', 'title': 'Christmas Kettle', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 641, 'bleu_score': 0.981898582188057, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15084106882888993959}, 'section': 'Section::::History.\n'}]}]