CREATE TABLE table_204_593 (id NUMBER, "year" CLOB, "chairperson" CLOB)

how long was paidsetti jayanthi the chairperson of this municipality ?
SELECT "year" - "year" FROM table_204_593 WHERE "chairperson" = 'paidisettijayanthi'
SELECT "year" - "year" FROM "table_204_593" WHERE "chairperson" = 'paidisettijayanthi'