CREATE TABLE table_79195 ("Rank" TEXT, "Capacity" FLOAT, "City" TEXT, "State" TEXT, "Year opened" TEXT)

What was the year opened for North Carolina with a smaller than 21,500 capacity?
SELECT "Year opened" FROM table_79195 WHERE "State" = 'north carolina' AND "Capacity" < '21,500'
SELECT "Year opened" FROM "table_79195" WHERE "Capacity" < '21,500' AND "State" = 'north carolina'