Question: ​when a firm refuses to allow union employees to enter the workplace the action is known as a
[{'answer': 'lockout', 'provenance': [{'wikipedia_id': '155134', 'title': 'Strike action', 'start_paragraph_id': 13, 'start_character': 148, 'end_paragraph_id': 13, 'end_character': 155, 'bleu_score': 1.0, 'section': 'Section::::History.:During and after the Industrial Revolution.\n'}]}, {'provenance': [{'wikipedia_id': '155134', 'title': 'Strike action', 'start_paragraph_id': 83, 'start_character': 0, 'end_paragraph_id': 83, 'end_character': 402, 'bleu_score': 0.9192507668025021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 826943110289787308}, 'section': 'Section::::Anti-Strike action.:Lockout.\n'}]}]