Question: when did the first weed eater come out
[{'answer': '1971', 'provenance': [{'wikipedia_id': '2940364', 'title': 'Weed Eater', 'start_paragraph_id': 1, 'start_character': 51, 'end_paragraph_id': 1, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2940364', 'title': 'Weed Eater', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 126, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7700568326190073390}, 'section': 'Section::::Abstract.'}]}]