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: Show the park of the roller coaster with the highest speed. | roller_coaster : roller_coaster_id , name , park , country_id , length , height , speed , opened , status | country : country_id , name , population , area , languages | roller_coaster.country_id = country.country_id | 

### Response:

select _ from _ order by _ desc limit _ | select park from roller_coaster order by speed desc limit 1