user: Question: What's the highest population density for a population less than 6000?
Columns: ['Country or territory', 'Area (km²)', 'Population', 'Population density (per km²)', 'Capital']
Types: ['text', 'real', 'real', 'real', 'text']
Sample row: ['Bermuda ( UK )', 54.0, 65000.0, 1203.7, 'Hamilton']
SQL:

assistant: SELECT MAX("Population density (per km²)") FROM "Table" WHERE "Population" < 6000.0;