user: Question: Name the typed for formed from 6-PUL Trailer Third in RES unit
Columns: ['Units', 'Type', 'Period used', 'Formed from', 'Trailers']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['601', '6-TC', '1965–1967', 'COR/PAN/PUL cars', 'TTK/TCK/TTK/TTK']
SQL:

assistant: SELECT "Type" FROM "Table" WHERE "Formed from" = '6-PUL Trailer Third in RES unit';