Question: who declared thanksgiving a national holiday in canada
[{'answer': 'Vincent Massey', 'provenance': [{'wikipedia_id': '8304293', 'title': 'Thanksgiving (Canada)', 'start_paragraph_id': 3, 'start_character': 52, 'end_paragraph_id': 3, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8304293', 'title': 'Thanksgiving (Canada)', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 156, 'bleu_score': 0.599630231943144, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14064902069890976454}, 'section': 'Section::::Abstract.'}]}]