user: Question: What is the sum of District, when Took Office is greater than 1981, and when Senator is Cyndi Taylor Krier?
Columns: ['Senator', 'Party', 'District', 'Home Town', 'Took Office']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Bill Ratliff', 'Republican', 1.0, 'Mount Pleasant', 1989.0]
SQL:

assistant: SELECT SUM("District") FROM "Table" WHERE "Took Office" > 1981.0 AND "Senator" = 'Cyndi Taylor Krier';