Question: what is the most densely populated western european country
[{'answer': 'Malta', 'provenance': [{'wikipedia_id': '1606824', 'title': 'European Union statistics', 'start_paragraph_id': 3, 'start_character': 448, 'end_paragraph_id': 3, 'end_character': 453, 'bleu_score': 1.0, 'section': 'Section::::Area and population.\n'}]}, {'provenance': [{'wikipedia_id': '1606824', 'title': 'European Union statistics', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 566, 'bleu_score': 0.979484453366057, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1572965271791973429}, 'section': 'Section::::Area and population.\n'}]}]