CREATE TABLE table_name_49 (length_of_retirement VARCHAR2, president VARCHAR2)

What is the length of retirement for president Sharma, Shankar Shankar Dayal Sharma?
SELECT length_of_retirement FROM table_name_49 WHERE president = "sharma, shankar shankar dayal sharma"
SELECT "length_of_retirement" FROM "table_name_49" WHERE "president" = "sharma, shankar shankar dayal sharma"