user: ### NOW ANSWER:
Question: List population when their car plates are 30-34.
Columns: ['car plates (since 1937)', 'Voivodeship Separate city', 'Capital', 'Area in 1000km² (1930)', 'Population in 1000 (1931)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['car plates (since 1937)', 'Voivodeship Separate city', 'Capital', 'Area in 1000km² (1930)', 'Population in 1000 (1931)']
SQL:

assistant: SELECT "Population in 1000 (1931)" FROM "Table" WHERE "car plates (since 1937)" = '30-34';