Question: which country in europe has the biggest population
[{'answer': 'Russia', 'provenance': [{'wikipedia_id': '28393374', 'title': 'List of European countries by population', 'start_paragraph_id': 2, 'start_character': 40, 'end_paragraph_id': 2, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]