Question: when was the first harley davidson bike built
[{'answer': 'September 8 , 1904', 'provenance': [{'wikipedia_id': '14142', 'title': 'Harley-Davidson', 'start_paragraph_id': 7, 'start_character': 335, 'end_paragraph_id': 7, 'end_character': 353, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '14142', 'title': 'Harley-Davidson', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 477, 'bleu_score': 0.642020362241553, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15706636100512686709}, 'section': 'Section::::History.\n'}]}]