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

### Instruction:
How many people in 1991 have a Village (German) of rupertiberg?

### Inputs:
table_name: table, columns: ['Village (German)', 'Village (Slovene)', 'Number of people 1991', 'Percent of Slovenes 1991', 'Percent of Slovenes 1951']

### Response:
SELECT COUNT Number of people 1991 FROM table WHERE Village (German) = rupertiberg