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

### Instruction:
Which Length has a Country of soviet union, and a Year larger than 1975?

### Inputs:
table_name: table, columns: ['Year', 'English title', 'Original title', 'Country', 'Length']

### Response:
SELECT Length FROM table WHERE Country = soviet union AND Year > 1975