CREATE TABLE table_204_479 (id DECIMAL, "defendant" TEXT, "arrested" TEXT, "charge" TEXT, "result" TEXT, "sentence" TEXT)

how many defedants were arrested in december of 1955 ?
SELECT COUNT("defendant") FROM table_204_479 WHERE "arrested" = 12 AND "arrested" = 1955
SELECT COUNT("defendant") FROM "table_204_479" WHERE "arrested" = 12 AND "arrested" = 1955