user: Question: When the Nokia Corporation had an accreditation level of joyn, what was the accreditation type?
Columns: ['Company name', 'Hardware Model', 'Accreditation type', 'Accreditation level', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sony Mobile Communications', 'XPERIA T, XPERIA J', 'Full', 'joyn Hot Fixes', 'Approved (awarded 15.11.12)']
SQL:

assistant: SELECT "Accreditation type" FROM "Table" WHERE "Accreditation level" = 'joyn' AND "Company name" = 'Nokia Corporation';