CREATE TABLE table_204_423 (id NUMBER, "name" CLOB, "location" CLOB, "city" CLOB, "listing date" CLOB)

name a site that was listed no later than 1960 .
SELECT "name" FROM table_204_423 WHERE "listing date" <= 1960
SELECT "name" FROM "table_204_423" WHERE "listing date" <= 1960