user: Question: What is the Class when Wessex Trains Pink is the Livery?
Columns: ['Number', 'Class', 'Name', 'Livery', 'Notes']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [31128.0, 31.0, 'Charybdis', 'Fragonset Black', 'Now operated by Nemesis Rail .']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Livery" = 'Wessex Trains Pink';