Question: in the united states which type of workers are the most likely to be unionized ​
[{'answer': 'public sector employees', 'provenance': [{'wikipedia_id': '2474406', 'title': 'Labor unions in the United States', 'start_paragraph_id': 4, 'start_character': 56, 'end_paragraph_id': 4, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2474406', 'title': 'Labor unions in the United States', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 407, 'bleu_score': 0.9250392488272071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11673413885277117774}, 'section': 'Section::::Abstract.'}]}]