user: Question: Can you tell me the sun of Population that has the Country/Region of hong kong, and the Rank smaller than 2?
Columns: ['Rank', 'Country/Region', 'Population', 'Area (km 2 )', 'Density (Pop. per km 2 )']
Types: ['real', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Singapore', 5183700.0, 710.0, 7301.0]
SQL:

assistant: SELECT SUM("Population") FROM "Table" WHERE "Country/Region" = 'hong kong' AND "Rank" < 2.0;