CREATE TABLE table_22977 ("Rank 2011" FLOAT, "Change since 2006" CLOB, "Urban Area" CLOB, "County" CLOB, "Population 2011" FLOAT, "Increase since 2006" CLOB)

In what urban area is the 2011 population 21561?
SELECT "Urban Area" FROM table_22977 WHERE "Population 2011" = '21561'
SELECT "Urban Area" FROM "table_22977" WHERE "Population 2011" = '21561'