user: Question: What is the total population of american samoa (us) that has less than 16280 km² arable land, less than 240 km² land area, and has a population density of more than 291?
Columns: ['Country', 'Population (July 2005 est.)', 'Land Area (km²)', '% of arable land (2005 est.)', 'Arable Land (km²)', 'Population Density (pop per km²)']
Types: ['text', 'real', 'real', 'text', 'real', 'real']
Sample row: ['World', 6447437283.0, 148940000.0, '13.31%', 19823914.0, 43.0]
SQL:

assistant: SELECT SUM("Population (July 2005 est.)") FROM "Table" WHERE "Arable Land (km²)" < 16280.0 AND "Land Area (km²)" < 240.0 AND "Country" = 'american samoa (us)' AND "Population Density (pop per km²)" > 291.0;