Table: salyut_7_expedition
Columns: expedition
crew
launch_date
flight_up
landing_date
flight_down
duration_days

Question: Name the duration for georgi grechko
SQL: SELECT "duration_days" FROM salyut_7_expedition WHERE "crew" = 'Georgi Grechko'

Question: Name the flight up for 10 december 1982 19:02:36 utc
SQL: SELECT "flight_up" FROM salyut_7_expedition WHERE "landing_date" = '10 December 1982 19:02:36 UTC'

Question: Name the launch date for  vladimir lyakhov , aleksandr pavlovich aleksandrov
SQL: SELECT "launch_date" FROM salyut_7_expedition WHERE "crew" = 'Vladimir Lyakhov , Aleksandr Pavlovich Aleksandrov'

Question: Name the flight down for vladimir vasyutin , alexander volkov
SQL: SELECT "flight_down" FROM salyut_7_expedition WHERE "crew" = 'Vladimir Vasyutin , Alexander Volkov'

Question: Name the duration for  vladimir vasyutin , alexander volkov
SQL: SELECT COUNT("duration_days") FROM salyut_7_expedition WHERE "crew" = 'Vladimir Vasyutin , Alexander Volkov'