You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "what is the most densely populated western european country?" whose answer is Malta.
Each document should contain about 30 words, and these documents should contain useful information.

Query: most densely populated western european countries
Useful Output:

Doc 1: Inspection of the data shows that of the larger countries, The Netherlands (497 persons per square kilometer) and Belgium (367) hold first and
Doc 2: Monaco led the ranking for countries with the highest population density in 2024, with nearly 26,000 residents per square kilometer. The Special
Doc 3: Monaco and Vatican City rank among some of the most densely populated countries in Europe. According to data by the United Nations, Monaco has a
Doc 4: 15: London, England · 14: Geneva, Switzerland · 13: Lisbon, Portugal · 12: Naples, Italy · 11: Copenhagen, Denmark · 10: Prague, Czech Republic · 9:
Doc 5: This also helps explain why Spain has the most densely populated km² in Europe; more than 53,000 people inhabit a single 1km² area in Barcelona.