CREATE TABLE table_75568 ("Stage" CLOB, "Winner" CLOB, "General classification" CLOB, "Points classification" CLOB, "Mountains classification" CLOB, "Team classification" CLOB)

Name the points classification for stage of 18b
SELECT "Points classification" FROM table_75568 WHERE "Stage" = '18b'
SELECT "Points classification" FROM "table_75568" WHERE "Stage" = '18b'