Question: What is the sum of Population (1 July 2005 est.), when Area (km²) is less than 5131, when Population density (per km²) is less than 180, when Subdivisions is Parishes, and when Capital is Roseau?
SQL: SELECT SUM("Population (1 July 2005 est.)") FROM "2-160659-1" WHERE "Area (km²)" < 5131.0 AND "Population density (per km²)" < 180.0 AND "Subdivisions" = 'Parishes' AND "Capital" = 'Roseau';

Question: What is the lowest Population (1 July 2005 est.), when Population density (per km²) is 0?
SQL: SELECT MIN("Population (1 July 2005 est.)") FROM "2-160659-1" WHERE "Population density (per km²)" = 0.0;

Question: What is Population density (per km²), when Name is Antigua and Barbuda, and when Capital is St. John's?
SQL: SELECT "Population density (per km²)" FROM "2-160659-1" WHERE "Name" = 'Antigua and Barbuda' AND "Capital" = 'St. John''s';