Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:

Convert text to sql: What are the distinct names and nationalities of the architects who have ever built a mill? | architect : id , name , nationality , gender | bridge : architect_id , id , name , location , length_meters , length_feet | mill : architect_id , id , location , name , type , built_year , notes | bridge.architect_id = architect.id | mill.architect_id = architect.id | 

### Response:

select distinct _ from _ | select distinct architect.name , architect.nationality from architect join mill on architect.id = mill.architect_id