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 names of musicals which have at least three actors. | musical : musical_id , name , year , award , category , nominee , result | actor : actor_id , name , musical_id , character , duration , age | actor.musical_id = actor.actor_id | 

### Response:

select _ from _ group by _ having count ( _ ) >= _ | select musical.name from actor join musical on actor.musical_id = musical.musical_id group by actor.musical_id having count ( * ) >= 3