Question: why was there an nhl lockout in 2005
[{'answer': 'a labor dispute', 'provenance': [{'wikipedia_id': '931004', 'title': '2004–05 NHL lockout', 'start_paragraph_id': 1, 'start_character': 342, 'end_paragraph_id': 1, 'end_character': 357, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '931004', 'title': '2004–05 NHL lockout', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 721, 'bleu_score': 0.667138719264587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2697546782848656389}, 'section': 'Section::::Abstract.'}]}]