CREATE TABLE table_204_284 (id NUMBER, "jurisdiction" CLOB, "adherents" NUMBER, "bishops" NUMBER, "priests" NUMBER, "monastics" NUMBER, "monasteries" NUMBER, "parishes" NUMBER)

total number of adherents in romania , cyprus , and greece
SELECT SUM("adherents") FROM table_204_284 WHERE "jurisdiction" IN ('romania', 'cyprus', 'greece')
SELECT SUM("adherents") FROM "table_204_284" WHERE "jurisdiction" IN ('romania', 'cyprus', 'greece')