CREATE TABLE table_71091 ("Artist" CLOB, "Country of origin" CLOB, "Period active" CLOB, "Release-year of first charted record" FLOAT, "Genre" CLOB, "Claimed sales" CLOB)

Name the period active for enya
SELECT "Period active" FROM table_71091 WHERE "Artist" = 'enya'
SELECT "Period active" FROM "table_71091" WHERE "Artist" = 'enya'