user: Question: Where is the PPP 23164 million €?
Columns: ['Region ( NUTS 2006)', 'Total (million € )', '€ per capita (2005)', 'PPP (million €)', 'PPP € per capita', '% of EU average GDP (PPP)']
Types: ['text', 'text', 'real', 'real', 'real', 'text']
Sample row: ['Nord-Vest', '11,575', 3499.0, 23164.0, 8500.0, '35.9']
SQL:

assistant: SELECT "Region ( NUTS 2006)" FROM "Table" WHERE "PPP (million €)" = 23164.0;