user: Question: What are all the dsl type offered by the M-net telecom company?
Columns: ['DSL Type', 'Provider', 'Resale', 'Down (up to kbit/s)', 'Up (up to kbit/s)']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['ADSL2+', 'Deutsche Telekom AG', 'no', 16000.0, 1180.0]
SQL:

assistant: SELECT "DSL Type" FROM "Table" WHERE "Provider" = 'M-net';