CREATE TABLE table_23927423_4 (teams NUMBER, relegated_to_league VARCHAR2)

How many teams participated (maximum) when Cornish All Blacks Pertemps Bees were relegated to the league?
SELECT MAX(teams) FROM table_23927423_4 WHERE relegated_to_league = "Cornish All Blacks Pertemps Bees"
SELECT MAX("teams") FROM "table_23927423_4" WHERE "Cornish All Blacks Pertemps Bees" = "relegated_to_league"