CREATE TABLE table_45023 ("Antibody" CLOB, "Brand name" CLOB, "Approval date" FLOAT, "Type" CLOB, "Target" CLOB)

What's the type for the brand herceptin with an approval date of before 2006?
SELECT "Type" FROM table_45023 WHERE "Approval date" < '2006' AND "Brand name" = 'herceptin'
SELECT "Type" FROM "table_45023" WHERE "Approval date" < '2006' AND "Brand name" = 'herceptin'