CREATE TABLE table_30121082_1 (area__acres__ INTEGER, poor_law_union VARCHAR(255), civil_parish VARCHAR(255))
What is the greatest area when the Poor Law Union is Skibbereen and the Civil Parish is Tullagh?
    
SQL: SELECT MAX(area__acres__) FROM table_30121082_1 WHERE poor_law_union = "Skibbereen" AND civil_parish = "Tullagh"