CREATE TABLE table_26970 ("Expedition" TEXT, "Crew" TEXT, "Launch date" TEXT, "Flight up" TEXT, "Landing date" TEXT, "Flight down" TEXT, "Duration  ( days ) " TEXT)

How many days were the station of Soyuz 35 in flight down were in orbit?
SELECT "Duration (days)" FROM table_26970 WHERE "Flight down" = 'Soyuz 35'
SELECT "Duration (days)" FROM "table_26970" WHERE "Flight down" = 'Soyuz 35'