CREATE TABLE table_31663 ("Region" CLOB, "Host" CLOB, "Venue" CLOB, "City" CLOB, "State" CLOB)

Tell me the host for midwest thomas assembly center
SELECT "Host" FROM table_31663 WHERE "Region" = 'midwest' AND "Venue" = 'thomas assembly center'
SELECT "Host" FROM "table_31663" WHERE "Region" = 'midwest' AND "Venue" = 'thomas assembly center'