Question: Among the countries in the High income: OECD group whose currency unit is Euro, how many of them have a note on the series code SP.DYN.AMRT.FE?
SQL: SELECT COUNT(T1.Countrycode) FROM Country AS T1 INNER JOIN CountryNotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T1.IncomeGroup = 'High income: OECD' AND T1.CurrencyUnit = 'Euro' AND T2.Seriescode = 'SP.DYN.AMRT.FE'