How many countries are having their country's footnotes described as "unspecified"? Please provide the full names of any three of those countries.
described as "unspecified" refers to Description = 'Not specified'; full names refers to LongName
SELECT COUNT(DISTINCT T1.CountryCode)  FROM Country AS T1 INNER JOIN Footnotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T2.Description = 'Unspecified' OR T2.Description = 'Not specified' UNION SELECT T1.LongName FROM Country AS T1 INNER JOIN Footnotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T2.Description = 'Unspecified' OR T2.Description = 'Not specified' LIMIT 4