Question: where did the great railroad strike of 1877 happen
[{'answer': 'Martinsburg , West Virginia', 'provenance': [{'wikipedia_id': '3587056', 'title': 'Great Railroad Strike of 1877', 'start_paragraph_id': 53, 'start_character': 91, 'end_paragraph_id': 53, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Aftermath and legacy.:Commemoration.\n'}]}, {'provenance': [{'wikipedia_id': '3587056', 'title': 'Great Railroad Strike of 1877', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 889, 'bleu_score': 0.975685032499179, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11167806546606021592}, 'section': 'Section::::Abstract.'}]}]