Table: minerva_corvette_2
Columns: name
pennant_number
builder
laid_down
launched
commissioned
current_status

Question: what builder is now retired
SQL: SELECT "pennant_number" FROM minerva_corvette_2 WHERE "current_status" = 'retired'

Question: what builder launched the name minerva
SQL: SELECT "launched" FROM minerva_corvette_2 WHERE "name" = 'minerva'

Question: what is the name of the builder who launched in danaide
SQL: SELECT "launched" FROM minerva_corvette_2 WHERE "name" = 'danaide'