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

### Instruction:
When salyut 7 – ve-4 – eva 1 is the spacecraft, what is the duration?

### Inputs:
table_name: table, columns: ['Spacecraft', 'Spacewalker', 'Start – UTC', 'End – UTC', 'Duration', 'Comments']

### Response:
SELECT Duration FROM table WHERE Spacecraft = Salyut 7 – VE-4 – EVA 1