user: Question: What's the downstream rate for the ITU G.992.2 having a version of ADSL?
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 "Downstream rate" FROM "Table" WHERE "Version" = 'ADSL' AND "Standard name" = 'ITU G.992.2';