Name the launch date for vladimir lyakhov , aleksandr pavlovich aleksandrov
CREATE TABLE table_26988 (
    "Expedition" text,
    "Crew" text,
    "Launch date" text,
    "Flight up" text,
    "Landing date" text,
    "Flight down" text,
    "Duration (days)" text
)
SELECT "Launch date" FROM table_26988 WHERE "Crew" = 'Vladimir Lyakhov , Aleksandr Pavlovich Aleksandrov'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Name the launch date for vladimir lyakhov , aleksandr pavlovich aleksandrov ### Input: CREATE TABLE table_26988 (
    "Expedition" text,
    "Crew" text,
    "Launch date" text,
    "Flight up" text,
    "Landing date" text,
    "Flight down" text,
    "Duration (days)" text
) ### Response: SELECT "Launch date" FROM table_26988 WHERE "Crew" = 'Vladimir Lyakhov , Aleksandr Pavlovich Aleksandrov'