Question: when was the first trade union formed in the uk
[{'answer': '1824', 'provenance': [{'wikipedia_id': '50879735', 'title': 'History of trade unions in the United Kingdom', 'start_paragraph_id': 3, 'start_character': 64, 'end_paragraph_id': 3, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::18th–19th centuries.\n'}]}, {'provenance': [{'wikipedia_id': '50879735', 'title': 'History of trade unions in the United Kingdom', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 815, 'bleu_score': 0.9845548242372031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9512283455509445820}, 'section': 'Section::::18th–19th centuries.\n'}]}]