user: Question: What is the enrollment ratio for preschool in the region where enrollment ratio for tertiary is 29.55?
Columns: ['Region', 'Preschool (0–5 years)', 'Primary (6–13 years)', 'Secondary (14–17 years)', 'Tertiary (18–24 years)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Arica and Parinacota', '42.92', '91.17', '76.65', '38.67']
SQL:

assistant: SELECT "Preschool (0–5 years)" FROM "Table" WHERE "Tertiary (18–24 years)" = '29.55';