CREATE TABLE table_201_18 (id NUMBER, "date" CLOB, "event" CLOB, "headline act ( s ) " CLOB, "supporting act ( s ) " CLOB)

which event is the most recurring on this list ?
SELECT "event" FROM table_201_18 GROUP BY "event" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "event" FROM "table_201_18" GROUP BY "event" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY