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

### Instruction:
When  гн(иј)ездо / gn(ij)ezdo is the serbo-croatian how many proto-slavics are there?

### Inputs:
table_name: table, columns: ['Proto-Slavic', 'Russian', 'Ukrainian', 'Belarusian', 'Polish', 'Czech', 'Slovak', 'Slovene', 'Serbo-Croatian', 'Bulgarian', 'Macedonian']

### Response:
SELECT COUNT Proto-Slavic FROM table WHERE Serbo-Croatian = гн(иј)ездо / gn(ij)ezdo