user: Question: What is the lowest against team in the six nations status in lansdowne road, dublin?
Columns: ['Opposing Teams', 'Against', 'Date', 'Venue', 'Status']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Wales', 15.0, '03/02/2001', 'Millennium Stadium , Cardiff', 'Six Nations']
SQL:

assistant: SELECT MIN("Against") FROM "Table" WHERE "Status" = 'six nations' AND "Venue" = 'lansdowne road, dublin';