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

### Instruction:
what is 1955 when 1961 is n/a?

### Inputs:
table_name: table, columns: ['1953', '1954', '1955', '1956', '1957', '1958', '1959', '1960', '1961', '1962', '1963']

### Response:
SELECT 1955 FROM table WHERE 1961 = n/a