Below is an instruction that describes a task. Write a response that appropriately completes the request.

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

### Inputs:
table_name: table, columns: ['President', 'Date of birth', 'Date of inauguration', 'Age at inauguration', 'End of term', 'Length of retirement', 'Date of death', 'Lifespan']

### Response:
SELECT Length of retirement FROM table WHERE President = sharma, shankar shankar dayal sharma