Question: when was the first handheld blow dryer invented
[{'answer': 'Around 1915'}, {'provenance': [{'wikipedia_id': '986413', 'title': 'Hair dryer', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 636, 'bleu_score': 0.920376582155893, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8840090823456687301}, 'section': 'Section::::History.\n'}]}]