Question: what was the meaning of the song puff the magic dragon
[{'answer': 'the hardships of growing older', 'provenance': [{'wikipedia_id': '158197', 'title': 'Puff, the Magic Dragon', 'start_paragraph_id': 9, 'start_character': 1020, 'end_paragraph_id': 9, 'end_character': 1050, 'bleu_score': 1.0, 'section': 'Section::::Speculation about drug references.\n'}]}, {'provenance': [{'wikipedia_id': '158197', 'title': 'Puff, the Magic Dragon', 'start_paragraph_id': 9, 'start_character': 700, 'end_paragraph_id': 9, 'end_character': 1303, 'bleu_score': 0.8908252003600011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11279282998396004168}, 'section': 'Section::::Speculation about drug references.\n'}]}, {'provenance': [{'wikipedia_id': '158197', 'title': 'Puff, the Magic Dragon', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 407, 'bleu_score': 0.960775763502243, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11279282998396004168}, 'section': 'Section::::Lyrics.\n'}]}, {'provenance': [{'wikipedia_id': '158197', 'title': 'Puff, the Magic Dragon', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11279282998396004168}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '158197', 'title': 'Puff, the Magic Dragon', 'section': 'Section::::Speculation about drug references.\n', 'start_paragraph_id': 9, 'end_paragraph_id': 9, 'meta': {'evidence_span': ['Yarrow has frequently explained that the song is about the hardships of growing older and has no relationship to drug-taking. He has also said of the song that it "never had any meaning other than the obvious one" and is about the "loss of innocence in children", and dismissed the suggestion of association with drugs as "sloppy research"', 'frequently explained that the song is about the hardships of growing older and has no relationship to']}}]}]