Question: when was the baikal-amur mainline (bam) railroad completed in the russian domain
[{'answer': '1991', 'provenance': [{'wikipedia_id': '56926', 'title': 'Baikal–Amur Mainline', 'start_paragraph_id': 18, 'start_character': 39, 'end_paragraph_id': 18, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::History.:Construction project of the century.\n'}]}, {'provenance': [{'wikipedia_id': '56926', 'title': 'Baikal–Amur Mainline', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 104, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10726259132763970300}, 'section': 'Section::::History.:Construction project of the century.\n'}]}]