CREATE TABLE table_66234 ("Year" FLOAT, "Stage" FLOAT, "Start" TEXT, "Finish" TEXT, "Leader at the summit" TEXT)

What is the highest stage number for a year later than 1948, leader at the summit was group, and finish was Bagn res-De-Bigorre?
SELECT MAX("Stage") FROM table_66234 WHERE "Year" > '1948' AND "Leader at the summit" = 'group' AND "Finish" = 'bagnères-de-bigorre'
SELECT MAX("Stage") FROM "table_66234" WHERE "Finish" = 'bagnères-de-bigorre' AND "Leader at the summit" = 'group' AND "Year" > '1948'