CREATE TABLE table_68958 ("Sport" CLOB, "Competition name" CLOB, "Competing entities" CLOB, "Age groups" CLOB, "Held every" CLOB)

what is the competing entities when the age group is 18 or younger, held every is one year and the sport is table tennis?
SELECT "Competing entities" FROM table_68958 WHERE "Age groups" = '18 or younger' AND "Held every" = 'one year' AND "Sport" = 'table tennis'
SELECT "Competing entities" FROM "table_68958" WHERE "Age groups" = '18 or younger' AND "Held every" = 'one year' AND "Sport" = 'table tennis'