user: Question: What's the version that has a 20.0 Mbit/s downstream rate?
Columns: ['Version', 'Standard name', 'Common name', 'Downstream rate', 'Upstream rate']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['ADSL', 'ANSI T1.413-1998 Issue 2', 'ADSL', '08.0 8.0 Mbit/s', '1.0 Mbit/s']
SQL:

assistant: SELECT "Version" FROM "Table" WHERE "Downstream rate" = '20.0 Mbit/s';