user: Question: What are the years for Eileen Derbyshire with a duration of 52 years?
Columns: ['Rank', 'Actor', 'Character', 'Soap Opera', 'Years', 'Duration']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Lesley Saweard', 'Christine Barford', 'The Archers', '1953—', '61 years']
SQL:

assistant: SELECT "Years" FROM "Table" WHERE "Duration" = '52 years' AND "Actor" = 'Eileen Derbyshire';