instruction: What is the area km2 of the area with a pop density people/km2 larger than 91, is a member state of Italy, and had less than 58.8 population in millions?
response: SELECT SUM("Area km 2") FROM table_42006 WHERE "Pop. density People/km 2" > '91' AND "Member State" = 'italy' AND "Population in millions" < '58.8'