CREATE TABLE table_28499 ("Institution" CLOB, "Location" CLOB, "Founded" FLOAT, "Type" CLOB, "Enrollment" FLOAT, "Joined" FLOAT, "Nickname" CLOB)

How many joined when the enrollment was 1150 in Sioux City, Iowa?
SELECT "Joined" FROM table_28499 WHERE "Enrollment" = '1150' AND "Location" = 'Sioux City, Iowa'
SELECT "Joined" FROM "table_28499" WHERE "Enrollment" = '1150' AND "Location" = 'Sioux City, Iowa'