Question: who had used the term collective bargaining for the first time
[{'answer': 'Beatrice Webb', 'provenance': [{'wikipedia_id': '253421', 'title': 'Collective bargaining', 'start_paragraph_id': 4, 'start_character': 59, 'end_paragraph_id': 4, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '253421', 'title': 'Collective bargaining', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 268, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7049810234171305943}, 'section': 'Section::::History.\n'}]}]