user: Question: What is the population density for 2012 for Gatunda sector?
Columns: ['Rank in Nyagatare Sectors, 2012', 'Sector', 'Area in sqkm', 'Population August 15, 2012', 'Population, August 15, 2002', 'Population Change 2002-2012 (%)', 'Population Density 2012 (km 2 )']
Types: ['real', 'text', 'real', 'real', 'real', 'text', 'real']
Sample row: [8.0, 'Gatunda', 52.0, 27879.0, 19716.0, '41.4', 535.0]
SQL:

assistant: SELECT "Population Density 2012 (km 2 )" FROM "Table" WHERE "Sector" = 'Gatunda';