Question: who is the longest serving parliamentarian in canada's history
[{'answer': 'Wilfrid Laurier', 'provenance': [{'wikipedia_id': '11922004', 'title': 'Records of members of parliament of Canada', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Period of service.:Longest.\n'}]}, {'provenance': [{'wikipedia_id': '11922004', 'title': 'Records of members of parliament of Canada', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 296, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2797842165330866500}, 'section': 'Section::::Period of service.:Longest.\n'}]}]