Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_49 ( length_of_retirement VARCHAR, president VARCHAR )

### Question ###
What is the length of retirement for president Sharma, Shankar Shankar Dayal Sharma?

### Accurate SQL ###

SELECT length_of_retirement FROM table_name_49 WHERE president = "sharma, shankar shankar dayal sharma"