user: Question: What is the minimum 2007 USD in Kabardino-Balkaria?
Columns: ['Rank (2008)', 'Federal Subjects', 'Russian Name', '2008 (RUB)', '2008 (USD)', '2007 (RUB)', '2007 (USD)', '2005 (RUB)', '2005 (USD)']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Moscow', 'Москва', 8441206.0, 339647.0, 6731189.0, 263134.0, 4135155.0, 146199.0]
SQL:

assistant: SELECT MIN("2007 (USD)") FROM "Table" WHERE "Federal Subjects" = 'Kabardino-Balkaria';