Question: when did robert frost publish the road not taken
[{'answer': '1916', 'provenance': [{'wikipedia_id': '1448016', 'title': 'The Road Not Taken', 'start_paragraph_id': 1, 'start_character': 61, 'end_paragraph_id': 1, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1448016', 'title': 'The Road Not Taken', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 120, 'bleu_score': 0.910879922930628, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 635469404958466858}, 'section': 'Section::::Abstract.'}]}]