CREATE TABLE table_245800_2 (duration__days_ VARCHAR2, flight_down VARCHAR2)

How many days were the station of Soyuz 35 in flight down were in orbit?
SELECT duration__days_ FROM table_245800_2 WHERE flight_down = "Soyuz 35"
SELECT "duration__days_" FROM "table_245800_2" WHERE "Soyuz 35" = "flight_down"