CREATE TABLE table_1921 ("Township" TEXT, "County" TEXT, "Pop.  ( 2010 ) " FLOAT, "Land  (  sqmi  ) " TEXT, "Water  ( sqmi ) " TEXT, "Latitude" TEXT, "Longitude" TEXT, "GEO ID" FLOAT, "ANSI code" FLOAT)

In Cavalier County and the geo id is larger than 3801931620.0, what is the population?
SELECT "Pop. (2010)" FROM table_1921 WHERE "County" = 'Cavalier' AND "GEO ID" > '3801931620.0'
SELECT "Pop. (2010)" FROM "table_1921" WHERE "County" = 'Cavalier' AND "GEO ID" > '3801931620.0'