Question: What was the area in glenella with a population of 522 in 2011?
SQL: SELECT AVG("Area (km²)") FROM "2-1256729-1" WHERE "Name" = 'glenella' AND "Population (2011)" < 522.0;

Question: What is the population density of siglunes when the change was smaller than -8.1 percent?
SQL: SELECT COUNT("Population density") FROM "2-1256729-1" WHERE "Name" = 'siglunes' AND "Change (%)" < -8.1;