Question: the type of shop outlawed by the taft-hartley act was the ____ shop
[{'answer': 'closed', 'provenance': [{'wikipedia_id': '553722', 'title': 'Closed shop', 'start_paragraph_id': 1, 'start_character': 12, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '553722', 'title': 'Closed shop', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 859, 'bleu_score': 0.9873810715615521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18104018724769892972}, 'section': 'Section::::Legal status.:United States.\n'}]}]