Question: Which federal republic country in Europe has the most provinces, and what proportion of GDP is devoted to services?
Calculate the population density as well.
SQL: SELECT T1.Country, T2.Service , SUM(T1.Population) / SUM(T1.Area) FROM province AS T1 INNER JOIN economy AS T2 ON T1.Country = T2.Country WHERE T1.Country IN ( SELECT Country FROM encompasses WHERE Continent = 'Europe' ) GROUP BY T1.Country, T2.Service ORDER BY COUNT(T1.Name) DESC LIMIT 1