CREATE TABLE table_204_278 (id NUMBER, "name of president" CLOB, "picture" CLOB, "life span" CLOB, "year of presidency" CLOB, "place of conference" CLOB)

which location had the most conferences listed ?
SELECT "place of conference" FROM table_204_278 GROUP BY "place of conference" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "place of conference" FROM "table_204_278" GROUP BY "place of conference" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY