CREATE TABLE table_62907 ("Rank" FLOAT, "Actor" CLOB, "Character" CLOB, "Soap Opera" CLOB, "Years" CLOB, "Duration" CLOB)

What are the years for Eileen Derbyshire with a duration of 52 years?
SELECT "Years" FROM table_62907 WHERE "Duration" = '52 years' AND "Actor" = 'eileen derbyshire'
SELECT "Years" FROM "table_62907" WHERE "Actor" = 'eileen derbyshire' AND "Duration" = '52 years'