CREATE TABLE table_204_823 (id NUMBER, "dates" CLOB, "location" CLOB, "attendance" CLOB, "official guests" CLOB, "notes" CLOB)

what was the first year the event was held at the pick congress hotel in chicago ?
SELECT MIN("dates") FROM table_204_823 WHERE "location" = 'chicago'
SELECT MIN("dates") FROM "table_204_823" WHERE "location" = 'chicago'