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

### Instruction:
Which district has an IUCN of iii and was established in 1998?

### Inputs:
table_name: table, columns: ['Reserve', 'District', 'IUCN', 'Co-management', 'Est.', 'Description']

### Response:
SELECT District FROM table WHERE IUCN = iii AND Est. = 1998