Database: world_development_indicators
Question: How many countries have country note description as "Sources: UN Energy Statistics (2014)"? List the currency of these countries.
SQL: SELECT COUNT(DISTINCT T1.Countrycode) FROM Country AS T1 INNER JOIN CountryNotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T2.Description = 'Sources: UN Energy Statistics (2014)' UNION SELECT DISTINCT t1.CurrencyUnit FROM country AS t1 INNER JOIN countrynotes AS t2 ON t1.CountryCode = t2.Countrycode WHERE t2.Description = 'Sources: UN Energy Statistics (2014)'