Question: when did lord of the rings become popular
[{'answer': 'the 1960s', 'provenance': [{'wikipedia_id': '29798', 'title': 'The Lord of the Rings', 'start_paragraph_id': 96, 'start_character': 841, 'end_paragraph_id': 96, 'end_character': 850, 'bleu_score': 1.0, 'section': 'Section::::Reception.\n'}]}, {'provenance': [{'wikipedia_id': '29798', 'title': 'The Lord of the Rings', 'start_paragraph_id': 97, 'start_character': 0, 'end_paragraph_id': 97, 'end_character': 784, 'bleu_score': 0.889961518767416, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5176346727919880094}, 'section': 'Section::::Reception.\n'}]}]