CREATE TABLE table_80045 ("Units" CLOB, "Type" CLOB, "Period used" CLOB, "Formed from" CLOB, "Trailers" CLOB)

Name the formed that has type of 4-cor
SELECT "Formed from" FROM table_80045 WHERE "Type" = '4-cor'
SELECT "Formed from" FROM "table_80045" WHERE "Type" = '4-cor'