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

### Instruction:
How many reserves were established on 19740329 29.03.1974?

### Inputs:
table_name: table, columns: ['NSG Nr.', 'Name of the nature reserve', 'District / Town', 'Area (ha)', 'Date established']

### Response:
SELECT COUNT NSG Nr. FROM table WHERE Date established = 19740329 29.03.1974