Instruct: What is the total population of American Samoa (US) that has less than 16,280 km² arable land, less than 240 km² land area, and has a population density of more than 291?
Output: SELECT COUNT Population (July 2005 est.) FROM table WHERE Arable Land (km²) < 16,280 AND Land Area (km²) < 240 AND Country = american samoa (us) AND Population Density (pop per km²) > 291