Question: who was involved in the railroad strike of 1877
[{'answer': 'Railroad workers', 'provenance': [{'wikipedia_id': '3587056', 'title': 'Great Railroad Strike of 1877', 'start_paragraph_id': 53, 'start_character': 71, 'end_paragraph_id': 53, 'end_character': 87, 'bleu_score': 1.0, 'section': 'Section::::Aftermath and legacy.:Commemoration.\n'}]}, {'answer': "Workingmen 's Party", 'provenance': [{'wikipedia_id': '3587056', 'title': 'Great Railroad Strike of 1877', 'start_paragraph_id': 33, 'start_character': 543, 'end_paragraph_id': 33, 'end_character': 571, 'bleu_score': 1.0, 'section': 'Section::::The strike.:Illinois.\n'}]}, {'answer': 'Federal troops', 'provenance': [{'wikipedia_id': '3587056', 'title': 'Great Railroad Strike of 1877', 'start_paragraph_id': 53, 'start_character': 329, 'end_paragraph_id': 53, 'end_character': 343, 'bleu_score': 1.0, 'section': 'Section::::Aftermath and legacy.:Commemoration.\n'}]}]