user: Question: What is every reference for the example of AF117?
Columns: ['Prefix class', 'Type and usage', 'Example', 'Equivalent', 'Reference']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['AC', 'Germanium small-signal AF transistor', 'AC126', 'NTE102A', 'Datasheet']
SQL:

assistant: SELECT "Reference" FROM "Table" WHERE "Example" = 'AF117';