user: Question: Which Zone is the lowest when Managed By southern and has Platforms under 2?
Columns: ['Stations', 'Place', 'Managed By', 'Platforms', 'Zone']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Centrale tram stop', 'Croydon', 'Tramlink', 1.0, 5.0]
SQL:

assistant: SELECT MIN("Zone") FROM "Table" WHERE "Managed By" = 'southern' AND "Platforms" < 2.0;